I'm a techie not an UIexpert/artist, but I think the simpler we can make the wallet for a start, the better. There should be an 'appliance' version that just has 3 rounds of DS+ hardcoded in with nothing a user can mess with, or something along those lines, as well as a more 'traditional' wallet.

They want buttonless gadgets? Give 'em buttonless gadgets... one screen (the existing wallet is a mess of redundant information and wasted space anyway) with a 'contacts' widget and a Send button. That's all most people need.