Jason Goldberg does a really good job of explaining why they are doing what they are doing. That is trying to tap into the passive job seeker. He also explains why they are not opening up for people to register because they are active job seekers and not the target market.
It is interesting to see the disconnect between what people are use to seeing online and what is happening at Jobster. What do I mean? Well normally when a company launches with a big fan fair they want lots of people to register or try out their service, Jobster is different.
Having said this I would love to look underneath the hood and see what makes Jobster tick, out of pure interest.