From the list of Web 2.0 award winners I'd say these

http://www.biblioz.com/

http://ma.gnolia.com/

could be useful from an information perspective.

This one's really interesting http://www.care2.com/

This is full of beautiful things

http://www.etsy.com/

and

these are

just

addictive.


http://www.newsvine.com/

http://www.onesentence.org/