This is an interesting site.
What they said on their about page..
What is Dissect Medicine?
Dissect Medicine is a medical news website that combines social bookmarking, blogging, and RSS. With Dissect Medicine, users submit stories for review, but rather than allow an editor to decide which stories go on the homepage, the users [...]

Helium Knowledge is a “knowledge exchange” where people come together to buy/sell/trade knowledge. The concept is simple: everybody knows something – trade it for something you don’t know

Web site ShortText publishes snippets of text online and provides a public or private permanent URL for quick information-sharing.

Sort of like a blog with no commitments past one, less than 7500-character post, ShortText could come in handy for swapping code snippets, directions, anonymous tips and stories. If you decide to make your message URL private, [...]