Cool Project: codesnipp.it
I've followed Amber Weinberg's blog for quite a while, and she has some pretty interesting posts over there. She also gets a lot of stuff published in places like FreelanceFolder. But recently, she has talked a little bit about developing web applications.
Her first web app (according to her site) is codesnipp.it. I signed up for the invitation list when it was announced, so I've been participating a little bit in the beta. So far, it's looking very promising.
codesnipp.it is a social site for developers to post their development work, follow and share code with other devs and get coding help. I have definitely been able to find some codesnipp.its that could come in handy, and I hope that I am able to help others.
codesnipp.it has some nice features such as syntax highlighting and Twitter integration. It also has multiple categories to post your codesnipp.its in, as well as allowing you to tag them as to what they do. You can also follow other developers to see what codesnipp.its they contribute and comment on. This can be especially useful for seeing how others in your field are solving problems.
codesnipp.it is currently still in invite-only beta, but it looks very promising to me. It is definitely aimed at developers, and I think this will prove to be a very useful tool.

