It is untested as I don't have access to VS2010 (Express editions can't use the NuGet Addin, maybe installing MVC3 RC on my Visual Web Developer 2010 Express).
http://nuget.codeplex.com/
No source feed for the moment, so copy at an empty folder and point a source to that folder.
It is just a package with no scripts to help it further integrate. At most I expect it to automatically add all the 3 framework libs as references.
Projects have to be hand-edited like per the sample I have there in github, so that each build on the IDE also run the tests if desired.
I'm stuck with VS2005, so I don't know the workflow VS users normally apply when using MS Unit Testing, but I envision that someone that prefers NUnit, for it's many additional features, can at least add some specific target for automated builds that is guaranteed to run tests on a per project (assembly) basis.
Rafael "Monoman" Teixeira
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"We live in a world operated by science and technology. We have also arranged things so that almost no one understands science and technology. This is a prescription for disaster. We might get away with it for a while, but sooner or later this combustible mixture of ignorance and power is going to blow up in our faces."
-Carl Sagan