Index: project/core/core.csproj
===================================================================
--- project/core/core.csproj	(revision 3352)
+++ project/core/core.csproj	(working copy)
@@ -649,6 +649,7 @@
     <Compile Include="tasks\BuilderException.cs">
       <SubType>Code</SubType>
     </Compile>
+    <Compile Include="tasks\SerialTask.cs" />
     <Compile Include="tasks\DataTaskResult.cs">
       <SubType>Code</SubType>
     </Compile>
@@ -688,6 +689,7 @@
     <Compile Include="tasks\NUnitTask.cs">
       <SubType>Code</SubType>
     </Compile>
+    <Compile Include="tasks\ParallelTask.cs" />
     <Compile Include="tasks\ProcessTaskResult.cs">
       <SubType>Code</SubType>
     </Compile>
Index: project/core/IntegrationResult.cs
===================================================================
--- project/core/IntegrationResult.cs	(revision 3352)
+++ project/core/IntegrationResult.cs	(working copy)
@@ -245,7 +245,10 @@
 
 		public void AddTaskResult(ITaskResult result)
 		{
-			taskResults.Add(result);
+            lock (taskResults.SyncRoot)
+            {
+                taskResults.Add(result);
+            }
 			if (! (Failed || Status == IntegrationStatus.Exception)) Status = result.Succeeded() ? IntegrationStatus.Success : IntegrationStatus.Failure;
 		}
 
@@ -388,4 +391,4 @@
 			return string.Format("Project: {0}, Status: {1}, Label: {2}, StartTime: {3}", ProjectName, Status, Label, StartTime);
 		}
 	}
-}
\ No newline at end of file
+}
Index: project/core/tasks/ParallelTask.cs
===================================================================
--- project/core/tasks/ParallelTask.cs	(revision 0)
+++ project/core/tasks/ParallelTask.cs	(revision 0)
@@ -0,0 +1,45 @@
+using System.Collections;
+using System.IO;
+using System.Threading;
+using Exortech.NetReflector;
+using ThoughtWorks.CruiseControl.Core.Util;
+
+namespace ThoughtWorks.CruiseControl.Core.Tasks
+{
+    [ReflectorType("parallel")]
+    public class ParallelTask : ITask
+    {
+        private ITask[] tasks = new ITask[] { new NullTask() };
+
+
+        [ReflectorArray("tasks", Required = false)]
+        public ITask[] Tasks
+        {
+            get { return tasks; }
+            set { tasks = value; }
+        }
+
+        public void Run(IIntegrationResult result)
+        {
+            Thread[] threads = new Thread[tasks.Length];
+            for(int i = 0; i < threads.Length; i++)
+            {
+                object[] objs = { tasks[i], result };
+                threads[i] = new Thread((ParameterizedThreadStart)ThreadStub);
+                threads[i].Start(objs);
+            }
+            foreach (Thread t in threads)
+            {
+                t.Join();
+            }
+        }
+
+        public void ThreadStub(object o)
+        {
+            object[] objs = (object[])o;
+            ITask task = (ITask)objs[0];
+            IIntegrationResult res = (IIntegrationResult)objs[1];
+            task.Run(res);
+        }
+    }
+}
Index: project/core/tasks/SerialTask.cs
===================================================================
--- project/core/tasks/SerialTask.cs	(revision 0)
+++ project/core/tasks/SerialTask.cs	(revision 0)
@@ -0,0 +1,28 @@
+using System.Collections;
+using System.IO;
+using Exortech.NetReflector;
+using ThoughtWorks.CruiseControl.Core.Util;
+
+namespace ThoughtWorks.CruiseControl.Core.Tasks
+{
+    [ReflectorType("serial")]
+    public class SerialTask : ITask
+    {
+        private ITask[] tasks = new ITask[] { new NullTask() };
+
+        [ReflectorArray("tasks", Required = false)]
+        public ITask[] Tasks
+        {
+            get { return tasks; }
+            set { tasks = value; }
+        }
+
+        public void Run(IIntegrationResult result)
+        {
+            foreach (ITask task in tasks)
+            {
+                task.Run(result);
+            }
+        }
+    }
+}
Index: project/UnitTests/Core/Tasks/ParallelTaskTest.cs
===================================================================
--- project/UnitTests/Core/Tasks/ParallelTaskTest.cs	(revision 0)
+++ project/UnitTests/Core/Tasks/ParallelTaskTest.cs	(revision 0)
@@ -0,0 +1,62 @@
+using NUnit.Framework;
+using Exortech.NetReflector;
+using ThoughtWorks.CruiseControl.Core;
+using ThoughtWorks.CruiseControl.Core.Tasks;
+using ThoughtWorks.CruiseControl.Core.Util;
+
+namespace ThoughtWorks.CruiseControl.UnitTests.Core.Tasks
+{
+    [TestFixture]
+    public class ParallelTaskTest
+    {
+        private ParallelTask task;
+
+        [SetUp]
+        public void Setup()
+        {
+            task = new ParallelTask();
+        }
+
+        [Test]
+        public void CanRunOneNullTask()
+        {
+            IntegrationResult result = new IntegrationResult();
+            task.Tasks = new ITask[1];
+            task.Tasks[0] = new NullTask();
+            task.Run(result);
+            Assert.IsTrue(result.Succeeded);
+        }
+
+        [Test]
+        public void CanRunTwoNullTasks()
+        {
+            IntegrationResult result = new IntegrationResult();
+            task.Tasks = new ITask[2];
+            task.Tasks[0] = new NullTask();
+            task.Tasks[1] = new NullTask();
+            task.Run(result);
+            Assert.IsTrue(result.Succeeded);
+        }
+
+        [Test]
+        public void PopulateFromReflector()
+        {
+            string xml = @"
+    <parallel>
+        <tasks>
+            <exec>
+                <executable>mybatchfile.bat</executable>
+                <baseDirectory>C:\</baseDirectory>
+                <buildArgs>myarg1 myarg2</buildArgs>
+                <buildTimeoutSeconds>123</buildTimeoutSeconds>
+            </exec>
+            <nullTask/>
+        </tasks>
+    </parallel>";
+
+            task = (ParallelTask)NetReflector.Read(xml);
+            Assert.IsInstanceOfType(typeof(ExecutableTask), task.Tasks[0]);
+            Assert.IsInstanceOfType(typeof(NullTask), task.Tasks[1]);
+        }
+    }
+}
Index: project/UnitTests/Core/Tasks/SerialTaskTest.cs
===================================================================
--- project/UnitTests/Core/Tasks/SerialTaskTest.cs	(revision 0)
+++ project/UnitTests/Core/Tasks/SerialTaskTest.cs	(revision 0)
@@ -0,0 +1,62 @@
+using NUnit.Framework;
+using Exortech.NetReflector;
+using ThoughtWorks.CruiseControl.Core;
+using ThoughtWorks.CruiseControl.Core.Tasks;
+using ThoughtWorks.CruiseControl.Core.Util;
+
+namespace ThoughtWorks.CruiseControl.UnitTests.Core.Tasks
+{
+    [TestFixture]
+    public class SerialTaskTest
+    {
+        private SerialTask task;
+
+        [SetUp]
+        public void Setup()
+        {
+            task = new SerialTask();
+        }
+
+        [Test]
+        public void CanRunOneNullTask()
+        {
+            IntegrationResult result = new IntegrationResult();
+            task.Tasks = new ITask[1];
+            task.Tasks[0] = new NullTask();
+            task.Run(result);
+            Assert.IsTrue(result.Succeeded);
+        }
+
+        [Test]
+        public void CanRunTwoNullTasks()
+        {
+            IntegrationResult result = new IntegrationResult();
+            task.Tasks = new ITask[2];
+            task.Tasks[0] = new NullTask();
+            task.Tasks[1] = new NullTask();
+            task.Run(result);
+            Assert.IsTrue(result.Succeeded);
+        }
+
+        [Test]
+        public void PopulateFromReflector()
+        {
+            string xml = @"
+    <serial>
+        <tasks>
+            <exec>
+                <executable>mybatchfile.bat</executable>
+                <baseDirectory>C:\</baseDirectory>
+                <buildArgs>myarg1 myarg2</buildArgs>
+                <buildTimeoutSeconds>123</buildTimeoutSeconds>
+            </exec>
+            <nullTask/>
+        </tasks>
+    </serial>";
+
+            task = (SerialTask)NetReflector.Read(xml);
+            Assert.IsInstanceOfType(typeof(ExecutableTask), task.Tasks[0]);
+            Assert.IsInstanceOfType(typeof(NullTask), task.Tasks[1]);
+        }
+    }
+}
Index: project/UnitTests/UnitTests.csproj
===================================================================
--- project/UnitTests/UnitTests.csproj	(revision 3352)
+++ project/UnitTests/UnitTests.csproj	(working copy)
@@ -673,6 +673,7 @@
     <Compile Include="Core\State\FileStateManagerTest.cs">
       <SubType>Code</SubType>
     </Compile>
+    <Compile Include="Core\Tasks\SerialTaskTest.cs" />
     <Compile Include="Core\Tasks\DataTaskResultTest.cs">
       <SubType>Code</SubType>
     </Compile>
@@ -715,6 +716,7 @@
     <Compile Include="Core\Tasks\NunitTaskTest.cs">
       <SubType>Code</SubType>
     </Compile>
+    <Compile Include="Core\Tasks\ParallelTaskTest.cs" />
     <Compile Include="Core\Tasks\ProcessTaskResultTest.cs">
       <SubType>Code</SubType>
     </Compile>