I just heard the last issue of dotnetrocks, and im interrested in getting that running for my projects.

Do anyone know some good ones? The more opensource and .NET, the better(Opensource is good, but if its written in .NET its even better!)

I have been looking at vault. Its $300, but its supposed to be really good.
Subversion is free and opensource, but written in C++ it seems.

What do you guys think?