Lining up a last-minute babysitter

Priceless might be great for finding someone to move your sofa but care for your kids, not so much. Check out urbansitter.com, a website mobile app that connects parents and caregivers in more than 14 cities with more on the way. The site can work one of two ways. You could post an ad describing your child and the maximum hourly rate you'll pay for the job and interested sitters will respond. Or you can sign in through Facebook to see if anyone in your network has used one of the sitters. It's a way to get recommendations from people you know. To connect with a sitter even for an initial over-the-phone interview will cost $15 each time or you can pay an annual premium to reach out to as many sitters as you like. Sittercity.com and care.com work in a similar fashion but both are more widely available nationwide. They also specialize on placing nannies for longer term care, and the latter can even help you find pet sitters or housekeepers. Neither these sites tap into social networks like UrbanSitter but they are longer established and appear to have millions of happy parents on their side. In San Francisco, I'm Kara Tsuboi, CNET.com for CBS News.