SourceForge has been reliable for me. I haven't looked at what other sites do, but I like having access to rsync the whole repository as a backup, and repository browsing on the server side.
google code is straightfoward, but FOSS only. I also use svnrepository.com for private projects, and syncing my documents between work and home. It's about $4 per month, which is peanuts.
beanstalkapp.com - We used it for the last Six Hour Startup Project and it worked well.
Also it is supported out of the box with the pretty Versions program on OSX.