pastymuncher
What's wrong with a key?
The same thing that's wrong with carrying around a seperate camera, CD player, pack of disks for the CD player, PDA, diary, phone etc. etc. They're unnecessary bits of metal. I'm all for keys getting swallowed up by convergence
If, that is, it can be made to work well. I'm a bit dubious about a security product that doesn't give you the details on how it works.