I've spent some time on NUnit tests for the stuff I do at work and felt I really should write an <nunit> task for Ant so I don't have to shell out to a different build tool or use <exec>. Since most of the stuff I needed was already present in my experimental Ant library for .NET development, it wasn't too difficult.
The result is inside http://cvs.apache.org/~bodewig/dotnet/dotnet.jar and the docs are either online or available as an archive.
All those tasks have only been developed and tested under Mono on Linux and MacOS X (1.0.1 highly recommended) or are completely untested - MSBuild (where does a mere mortal get it - would it run on Mono?) and WiX (doesn't work on Mono). Because of this, feedback by a Microsoft framework users would be extremely useful, but any feedback is appreciated, of course.
Update: Steve has successfully tested the library using the Microsoft .NET Framework 1.1.
path: /en/Apache/Ant/dotnet | #