We already use one of the big job websites, so I don't really see what this would offer that's different?
That said, filtering resumes by criteria is still pretty crappy. I mean, I'd love it if people could put in their availability and we could filter by that, in more detail than just "weekdays/weekends/evenings". I'd love to be able to give other industries relevance scores so if people had experience in them, it gave a certain amount of added weight, etc.