I currently use two wallets.
Perter Nardi's Stealth Wallet
From,
http://www.alakazam.co.uk
price £24.99
This is an extremely well made half length leather wallet - that can also very easily be used as your everday wallet. It's main use is as a mindreading peek device - and so far I have used it with out any suspicion whatsoever.
I would rate this wallet very highly indeed, and very good value for money.
The Change Wallet
From
http://www.magictricks.co.uk/prodshow.asp?code=47
price £4.50
This wallet is full size, although in imitation leather (or plastic to be more specific). Its main use is vanishes and changes - which it does suprisingly well.
Personally I would prefer this to be much better quality - ie made from leather - but in saying that it does what it says it will do very well indeed - and given the price I would have to say it is good value for money.
hope this helps...