I'm building a digital picture frame out of an old laptop and have stripped out everything except for the screen, motherboard, ram, and hard drive to make the frame as thin as possible. It's working out great, except for one problem, I don't have a way to switch between pictures.
I'm not about to hook up a full size KEYBOARD and make the thing look geeky.
What I would like is a two- to six-button keyboard that could hook up via ps/2, usb, or even serial, if I absolutely have to.

Does anybody have any ideas on how to search for such a thing? I've tried "four-button keyboard", and I just get results for four-button mice and other unhelpful stuff. I'm having trouble coming up with any other search ideas.
If you've got any other ideas for my picture frame, then LET me KNOW too.....
thanks.
What about something like this:

I saw those on newegg, but I think it's a bit too big. I'd like to be able to integrate the buttons into the frame.
I was THINKING about getting a usb mouse and taking it apart to just use the buttons because linux lets you choose the function of the buttons.



If it were real, that might actually work Something like Optimus mini three?

It is pretty expensive though. But on the plus side you get a 3 button keyboard with tiny OLED screens for keys.