NUnit 2.2 for .NET v2.0 RTM
I've modified the public MSI with the Orca tool so that it installs in any version of .NET (which runs fine and is supported anyways...). So go download it and enjoy doing TDD ;).
Update: I forgot to mention that after installation, you must open the nunit-gui.exe.config and nunit-console.exe.config and replace the <startup> element with:
<startup>
<requiredRuntime version="v2.0.50727" />
</startup>