maybe you should buy 2 (or three) of them?
10-15 cards should be enough for most people.

I bought one despite the fact that my life requires alot more space....it's perfect for everyday use though! I always hated worrying about my wallet when on the go--now I keep some cards in my PDA case, and just carry the essentials when walking around or out to lunch. The best part of it is the fact that it protects the cards way better than a leather wallet, and forces you to keep organized when you get home (logging transactions, filing receipts, etc).

Update.....the jimi is still alive, though I have not used it in months. Need a full size checkbook wallet these days.

J.