At the mo, I have 2. One in my pedal bag/board, the other for when I do any recording.
The pedal board one is your common or garden CryBaby GCB-95. Nothing to write home about.
The other was a bit of an eBay find, which kind of restored my view of eBay a bit. It's a ColourSound Wah-Wah, that looks more like a big red shoe shine box, but has a wonderful vintage tone to it. The downside is the fact that it is only battery powered, though if I really wanted to, I could rig up some kind of power connection, though I wouldn't want to damage/modify the case. According to the Harmony Central review, it has the dubious credit of being the Isaac Hayes "Shaft" Wah. Cool. ;)