I know the founder of this startup. She is awesome. I think their methodology is smart when it comes to temporary talent. I would rather hire someone connected to me via linked in rather than a random off elance or craigslist.
I bet it's better than elance or craigslist, but how is it different than a more traditional staffing agency? I've talked with other companies with models similar to this, where you ask for semi-skilled talent, and they provide it for a cost. Then they handle all the junk associated with employing somebody.