In Visual Studio 2010, you can now get your F# unit tests loaded by the IDE. First, create your F# test project. This is just a normal library referencing Microsoft.VisualStudio.QualityTools.UnitTestFramework and having test classes and so on. The only change you need to do is go into the configuration and set the output folder to "bin" for both debug and release (instead of bin\debug).

Next, create a C# Test Project, and delete the code file. Then add an existing item, and navigate to the bin directory of your test project output. Select the DLL and Add as Link.

Finally, right click the solution, and change the project dependencies so the C# test project depends on your F# test project.

That's it. Now the IDE will pickup your F# tests and allow you to manage, run, and debug them right from VS. You may have to restart the IDE after setting all this up for it to work smoothly.