CiteULike already has a good description: "A free online service to organize your academic papers". With tags, almost inevitably. It'll be interesting to see how well this does, as it's something I wanted to add to biologging but never had the time to do properly. Looks good so far, though. <via>
Comments
All fields are optional, email address will not be shown; no HTML, URLs are automatically hyperlinked.
... and I've just added support for HubMed too. If you click the "->CiteULike" bookmarklet while looking at a single article's abstract on the hubmed.org site, you should end up with that article in your CiteULike library.
Standard disclaimer: Beta software, etc. No guarantees. And it's still an undocumented feature, so please email me (camster@citeulike.org) if it doesn't work for you.