Weddingbee boards

Okay, I don't know what your budget is on this but I know you can get a digital SLR like a Canon Rebel (that'll be at the lower end of the price range on those, most likely) and get a shutter release, which I think is what you're referring to--it plugs into the camera and a little cord runs over to you and you push the button and the picture snaps.  Sometimes you can find places that'll rent the camera but usually there's a deposit.  You can just buy the shutter release--they're not too expensive but they ARE specific to different models so pick a camera first.

Other ideas--use a point and shoot on a tripod and leave a little card with instructions on how to set the timer, or leave the P&S on the tripod and just let people recruit their own people to push the button.  Usually photo booths are so fun that they're swarming with people and I bet they'd help each other out.  Or is there someone who will be at the wedding who would be wiling to man the photo booth?  Or someone on CL?  

Good luck!  I think photo booths are so fun. :)

I've done a handful of photobooths for weddings before.  Do you have any friends that have a DSLR?  You could probably borrow one from them, and get a wide enough lens to make sure you get everyone in.

It might be beneficial if you have someone man the camera.  Have a family friend who's fun to have fun with the guests. :)  They also have shutter remote releases that people can hold and take the photo themselves if you don't want to do the self timer.

OOh don't forget props!  what are you going to have as props?