Acer America has introduced a new ultraportable pico projector, the C120, which can actually be powered by a PC via USB connection. It features an LED lamp (with instant ON), is natively 16:9 WVGA resolution (854×480) and offers a 100-ANSI lumen brightness spec. This new projector is also plug-and-play compatible with notebook PCs, so no drivers need to be installed. The Acer C120 is specified to have a 1000:1 contrast ratio and uses a 20K-hour lamp. It measures only 4.72 inches (W) by 3.23 inches (D) by 1.0-inch (H), while weighing 6 ounces.
Here are all the specs: http://us.acer.com/ac/en/US/content/group/projectors