Sony Portable Projector MP-CD1 Experts Review
Sony MP-CD1 Mobile Projector review
If you do give impromptu presentations and don't want to depend on the quality of tech you find in offices and hotels, the MP-CD1 (preferably outfitted with a small portable speaker and a wireless dongle) will do the job. If you aren't a traveling business person and you're looking for a projector with a bit more brightness, you're best served looking at full-on home theater projectors.
Geek Review: Sony MP-CD1 Mobile Projector
Great for carry-on or as a travel companion, the MP-CD1 produces images of acceptable quality, but otherwise fail to live up to its price tag.