If the idea of 500 Mb of free Subversion, Trac (with XML-RPC access for things like Mylyn), Wiki, and a whole lot more sounds like a good thing to you, check out Assembla.com. I signed up last night and am really quite floored.
This thing has virtually everything one could want in a project management, source code, ticket tracking, and team collaboration setup. And again, it's free for up to 500 Mb of stuff. And after that it is a paltry $12.50 per month for 5 Gb of storage, plus a few extras like https access.
I've been hosting my own SVN locally but have increasingly been thinking about moving it to an external service so that I can get to it from anywhere. This seals the deal. So far, Assembla has been very impressive, and if it keeps up, I'll be springing for the $12 commercial account and be done with it.
Have a look if you have been thinking about jumping on the Subversion or Trac bandwagon but don't have the time or inclination to set up your own server. And if anyone else has been using Assembla, please share! Thanks.