eBay with Neewer has the Mini Pocket Pico Projector for iPhone for $84 with free shipping. Features 4:3 aspect ratio, 320 x 240 resolution, built-in speaker, audio output jack, and 30-pin Apple and A/V input.
While I wish things like this worked, they don't. When it comes down to it $80 or $100 can be spent on better methods of watching video or viewing images. I wouldn't expect anything significant in such a small size. Put the money towards something more powerful like a real projector, tablet, or refurb monitor and save yourself the frustration.
With the Pop Video announced at $99 list for qHD resolution, this thing is way overpriced. Check out http://www.thepopvideo.com
While I wish things like this worked, they don't. When it comes down to it $80 or $100 can be spent on better methods of watching video or viewing images. I wouldn't expect anything significant in such a small size. Put the money towards something more powerful like a real projector, tablet, or refurb monitor and save yourself the frustration.
Apple TV is only $15 dollars more and will display anything that is on an iphone or ipod touch wirelessly and do MUCH more.