HardwareZone took a look at Dell's 3400MP Projector, here's a short snip:

"For practicality and convenience sake, an ideal portable projector should be small, lightweight and should preferably come with an integrated speaker for complimentary background music. Just being 'portable' may not be enough these days because to the marketing and sales executive folks in the fast lane, a really ultra-portable projector is likely the next best companion to their laptop for presentation and sales pitches to a large audience. One such petite projector with all these lovable traits is the Dell 3400MP."



Link: HardwareZone