SourceForge has been around as long as I can remember. Everyone in the web development community has heard of, and probably even used it many times. I’ve personally only used SF.net to download projects, that part works great, multiple mirrors, easy access to the author’s website… But the search part, forums, etc. is just a pain to use. Their new redesign looks great, but they still haven’t changed it’s features.
Google Code on the other hand, is slick, fast, and also provides developers ways to integrate Google technologies into their products. When you create a Google Code Hosted Project, it comes with a handy downloads page, it’s own wiki, an ‘issues’ place (which is kinda like tickets/forum topics), a project summary page, and it even has a way for you to view the source code for your project too!
I'm not finished with the design of my blog quite yet, please hold on while I fix the comments, archives, and search templates.