I have been using a great new server called devjavu for my svn and trac hosting. Its free for open source projects and the guy who runs it is cool. I have had great experience with the service so far on three of my projects hosted their. You can request an invite here:
ok - but I was kind of interested to find out if there was a particular reason why potentially rubyforge could be more advantageous to ruby on rails developers (hence partially ruby on rails forum related)