For Frequency 2010, a major electronica event in Edmonton (Alberta, Canada), we created a photobooth in conjunction with Limages Night.
The setup is an 8x8' mural, made up of three overlapping 3x8' panels. This is supported on its frame by the boom setup previously mentioned, with the boom extending over the 8x8' panel and holding a small strobe. Other lighting is provided by two softboxes on either side, all triggered with Paul C. Buff CyberSyncs.
Shots are taken tethered to a computer, and then forwarded to a second computer for printing. Prints are made and sold on-site.
Here's what the setup looks like: