It looks like SourceForge is is planning to roll out subversion hosting as part of its service. They don't give a timeline, but I hope it's Real Soon Now.
That would be nice, because I've got to put a whole bunch of code there in the near future, and it's all under SVN control now. Being able to do an svn export would help quite a bit, since I don't want to lose all commit messages...
Update: As of 2006/02/21, Subversion is available for all projects on Sourceforge.