Nice buttons. One of these sure would look purdy on the front of a Boof...
Generic inks. I've been ordering inks from these guys for years, great quality, quick shipping, great prices. Note that sometimes you can find cheaper bulk prices from them by searching for them on ebay.
Photobooth.net. A photobooth blog with lots of photobooth releated stuff.
TheKnot.com. A good place to advertise your photobooth business.