I was reading Robert Scoble's blog, specifically the post from September 6th where he bagged DEMO companies. If you read the entire post, you would have seen he did not reference us specifically, in fact at the time of the post we had a static beta invite site up, which was similar to our home page, so he had never seen our website. In a later post, where he mentions nice things about DEMO companies, he says he likes our home page, therefore Paidinterviews was not one of the sites Scoble was talking about when he bagged DEMO companies.
One component is similar Realmatch, jobfox and itzbig, but none of these sites allow you to network with other candidates, outline your "ideal job", name your signing bonus upfront or research companies based on other candidates feedback.