I did another photobooth at a wedding last week and it worked out really well. (Pics are here on flickr) The biggest improvement this time: A laptop for instant review. People really seemed to react to being able to see their antics on the screen and I think this is a "must have" for future setups. I did this by having Lightroom 4 in tethered mode, in the loupe module with no toolbars visible. Valuable sides effects being the ability to check focus if needed, and no work required at the end of the day to download cards.
If I had it to do again I would have an external monitor visible for public reviews but not have the keyboard accessible. There were a few people who always wanted to go back and review previous shots or delete bad ones and that's a level of fussing I don't want to allow.
Also, next time I'd like to bring some props. :-) Some hats, a feather boa, or something like that. In this case though, people had no trouble having fun. (And the reception was dry too!)