I've got a few pretty cool domain names. I'll give them away, to you, if your idea is good for what you want to do with it. This is also an interesting experiment in how people think about intellectual property vs. execution in the startup world.
In any case, I think it's not so much that the name matters, but if you have a good product that people hear about frequently, the name simply becomes a few phonemes associated with that company and loses all other meaning. That's why my friends Kimmo, America, and Pooja used to have names that sounded ridiculous to me, but now the names almost seem natural as labels.