"...a social network site for bloggers & blog readers. It’s a free online community anyone can join. PostOnFire users discover & share the best blog posts on the net. PostOnFire includes a voting system that put our readers in control of which blog posts should be in the front page. When a new link to a blog post is submitted, it will be added instantly to our “just submitted” section. When a blog post link in the “just submitted” section receives enough votes and less “extinguish”, it will move to the front page “hot posts”. “Extinguish” is a feature that let users report a link that is not worthy or it’s a spam. When a blog post link receives too much “extinguish”, it will be discarded."
It’s like Digg, but may prove itself to have a little less attitude. I’m trying it, and having good results in terms of driving blog traffic.