Joedog86’s Instructable on an under $100 photo frame – “I basically made this as a birthday present for my girlfriend. Looking for an awesome gift idea? This is it! Total cost was under $100, and could be substantially less if you’re savvy. I know I’m not the first one to come up with the idea of a homemade digital picture frame. I’m not even the one to come up with the idea of using the particular lcd screen and digital photo viewer that I chose. But I can write a darn good how-to about it, and there’s no stopping me!” – Link.
Tons and tons of DIY digital photo frame projects – Link.