Woot! had a neat WowWee RC vehicle on the other day, and I sent a link to a coworker thinking he might dig the locomotion system (he's a mechanical engineer, but an okay guy nonetheless). Five minutes later, he shows up at my desk with this:
He'd bought it years before, for no particular reason. He dug a bit and found a website that sells it, $9 a pop.
Yet another really cool item I'll never get to use in a project.