It is interesting to see the list of logos shared on Web 2.0 Awards. Nearly all 2.0 needs seem to have been met by invested 2.0 stakeholders.
I chose to try Thoof. It is described as a “Social News and Culture Site”. The idea is that the site learns your preferences through repeated use, and offers choices to suit personal taste. I noticed quite a bit of Spam content while I was there.
By googling “Thoof”, I discovered an article written in December 2007. It predicted a short life span for this social tool after a mere six months from launch. Apparently preferred customers had not found the site. “People who Thoop are not the same people who Digg”. So, this may not be one which remains at the top for long.