[SML] Portable video projector recommendation?

[Mt. Angel Performing Arts Center]

Hi all,

As the subject says we are in the market for a portable video projector.

The application is taking it to a trade show to play a demo of a new 
product I am involved with.

The requirements:

VGA or similar video input
Small enough to easily fit into checked baggage. (Carry-on would be even 
better.)
durable
bright
inexpensive

Projection throw about 8 feet, the collapsible screen we have is about 
36" x 48".

Any suggestions?

Thanks in advance

Carla