Looking around blogs, the PayPerPost(PPP) badges seem to be quite prominent and so out of curiosity I decided to see what it was all about. I signed up, but I wasn't approved instantly. After some effort I finally managed to get accepted.
PayPerPost, better known as PPP is a new self-service marketplace for bloggers to blog about things that they love and get paid for it, and for advertisers to advertise their product/service/ website reviewed. In PayPerPost, publishers(bloggers) get to see the list of advertisers' requests, and would be able to choose which opportunity to write on, provided they are eligible for it. Apparently the higher the pagerank of your blog, the more opportunities one would have.
To be eligible to sign up, new blogs have to be at least 90 days old with at least a minimum of 20 posts. The best part is that there is no quota needs to be fulfilled. Once your blog is approved, you can start looking out for opportunities to write and be paid via Paypal. It's really that easy.