via engadget.com
So... you have a movie on your personal laptop and want to show it in class. Do you (a) email the huge file so you can download it to the computer that is attached to the LCD projector, or (b) hook up your personal computer to your LCD projector (wasting valuable time) or (c) stream the media from your personal laptop to the computer that is already hooked up to your LCD projector?
I'm going with C, and for about $129.