I used this service when I could not dream up a cool domain name. http://www.pickydomains.com/ It works wonderfully and real people think up your domain name. Its well worth the $50 and also one of the coolest simplest startup ideas I have seen in a while.
you just give them your idea in a sentence or two and they fly with it. Also I had my new name in 24 hours, which is pretty cool and fast, especially when you where supposed to choose a domain yesterday...