This week we created a sourceforge project to host our development of scikit-learn. Although the project already had a directory in scipy's repo, we needed more flexibility in the user management and in the mailing list creation, so we opted for SourceForge. To be honest, after using git and Google Code for bug tracking, I was not very excited about using subversion/sourceforge again. On the other hand, we needed some sort of compromise that would allow a very heterogeneous range of developers to work together, and after some (surprisingly civilized) emails and some chatting with Gael, we agreed that SourceForge was indeed the best choice. In case you are interested, there's a (preliminary) web page with more info. You might also want to have a look at the previous project's scipy web page.