I have been thinking about how to implement this idea for a long time now... It is great to see it is already being done. I think the website could use an update/redesign, though. Perhaps someone here can donate some webdesign?
A site like this relies on transparancy and trust, and the site itself doesn't scream 'trust me', although with a bit of looking around (reading this thread, etc) it sure seems legit, which is wonderful.