Optoma Technology PK-101 Pico Pocket Projector for $202.70 shipped.  Here is a screenshot for your reference.  It projects image size up to 60", has a LED light source for over 20,000 hours use, and comes with a rechargeable battery via USB or AC charger.  It can be connected to iPod, iPhone, and iTouch, camcorders, digital cameras, DVD players and other video players via A/V composite cable.  Note that this projector connects to devices with a composite output only.  Most places have it for about $229.