I just run into some difficulities with NUnit with regard to serialiation of proxied types across AppDomains. Working in TD.Net, fails when run on the console. I tried MbUnit, it worked on both. There are solutions to the AppDomains issues, but I am currently using MbUnit in another project, and I love the abilities, so I moved the entire Rhino Tools project to use MbUnit. It was mostly replace the reference and replace NUnit with MbUnit.

And so the wheel turn...