CiteULike:

CiteULike is a free service to help academics to share, store, and organise the academic papers they are reading. When you see a paper on the web that interests you, you can click one button and have it added to your personal library. CiteULike automatically extracts the citation details, so there’s no need to type them in yourself.

This is delicious for scholarly research. Looks pretty interesting and a great way to conduct collaborative research on like topics. Spotted via David Weinberger.