You should throw this up on github, bitbucket or codeplex. DVCS always seems to work best for this type of development.
GitHub are probably much hotter then Sourceforge this days, but Sourceforge was what we used back then :) Do you think that it is worth the effort to change to GitHub? Will it be easier to attract more developers then?
Any other suggestions?
so i don't think it's going to be a big help right now. it would make more sense for the new owner (if/when you find one) to do it... your time would be better spent trying to find that special someone. do you have any way to contact existing users? emails? could you put a pop-up in the next release?