Now you got a PR of 2... seems you are changing PR quite often lol... Btw, I got PR 3 in the previous update on my website about making money online. yay! =)
its your content and on page SEO that help you to get the PR this high . it took 1 year for my site to get pr-1. and i work for 8 month to get the pr.
All because of your content. No matter of back links if your website containing great, unique content then surely your website rewarded with a page rank.. Keep moving .