I'm a big fan of SourceForge as it makes collaborative development for open source projects work. It may not have the best bug tracker, forum software etc, but considering the scale of the site, I am awed by their efforts.
The only real problem I have with SourceForge it the anonymous CVS. Apparently it rarely works (as a committer you get SSH access, which almost always works), considering the number of complaints on our mailinglists. This has raised the question of whether we should stay at SourceForge or move to another open source portal.
I rarely see support tickets on the SourceForge support trackers regarding anonymous CVS. Is the Sourceforge support staff even aware that there is a problem?