NCrunch - Pretty Amazing

This is really just a shameless plug for a project that I think is stunningly well executed and will save anyone that does unit testing in .NET so much of the disruption they go through every day in stopping coding, compiling and then running their unit tests when they can just let their dev environment do all that for them in the background.  The project is NCrunch - http://www.ncrunch.net/download.htm and, in case you hadn't guessed I'm a big fan.  It works better, in my opinion, on NUnit than MSTest, but then the world is a much nicer place when you use NUnit anyway.