The tiny 4 oz. Pico Pocket Projector Optoma EP-PK-101 PICO is available for pre-order on Amazon.com for $399.99.

The Optoma EP-PK-101 utilizes the TI DLP Pico projector module like several other pocket projectors already on the market.
Specifications of the Optoma EP-PK-101 include projection image size up to 60 inches, 1,000:1 contrast ratio, 2.5mm jack AV Input, LED light source lasts over 20,000 hours, up to 1.5h of operation on single battery charge, and the battery can be recharged via USB or included AC charger. The measurements of the smallest Optoma projector are 1.97" x 0.59" x 4.06" (50 x 15 x 103 mm).
The Optoma EP-PK-101 comes bundled with a cable to connect iPod, iPhone & iPod Touch.
More details on Amazon.com.