I have a Mighty Wallet from Dynomighty Design. Its pretty durable for $15, and for the white one, you can draw on it yourself.
I bought it on 14 October 2009, so nearly a year ago, and it's still in one piece. Always gets people talking as well
I've got 3 Dynomighty Design wallets. The envelope, the New York map, and the lined sheet of paper one. The lined sheet hasn't been used it, but the envelope and New York map have been broken in pretty nicely.
Until I get a proper career where I need to look presentable, I'll keep using them.