Also you could use a video and a cheap TV to display the scenes inside the booth as they happen. I have done this at events and people go nuts and crowd around the TV.
Also check this article out, you could display a broswer page that would refresh as you shoot:
http://www.g4tv.com/techtvvault/feat..._Mac_OS_X.html
here's a snippet, it's from 2003 so I imagine the list of compatible cameras is longer now:
On the other Mac, open Image Capture and choose Devices > "Browse shared devices." Open the flippy triangle, select the camera, click OK, and open Safari (Apple's Web browser). When the thumbnails appear, you can proceed to view and download the photos exactly as though the camera is connected to your Mac.
Now, all digital cameras can share what's currently on their memory cards via the Internet as described above. But if you have one of a few newer models, you can also control the camera remotely. You can spy on whatever's in the room where the camera is, taking snapshots on demand. (Can you say, "Babysittercam"?)
Note: Some of the webcamable cameras are the Canon A60, A70, S400, S50, and G5; HP C618 and 912; Kodak DC280, DC4800, DC5000; and Nikon D1, D1X, and D1H.
Just repeat the steps above. Then, if your camera is one of the compatible models, the Remote Monitor tab springs to life, as shown below, along with the buttons labeled Delete, Take Picture, and so on.
Clicking Take Picture captures a picture exactly as you would if you'd been next to the camera and pressed the shutter button.
If you click the Remote Monitor tab, you see, at full size, whatever the camera is seeing; the image is updated once every minute. (The pictures are blasted to you via the Internet but not captured on the memory card.) Click the light-switch icon to change the shutter interval
Linear Mode
