I had fun over the past fornight playing with the MiniPro projector, it runs from 2 USB ports and should require no drivers. I had to test it on a Windows machine as my Mac did not work at this time, though I am assured it will be compatible shortly. The unit is tiny, it literally fits in the palm of your hand, very cute. While it is not colour managed, it does a fine job of throwing up an image in impromptu circumstances (surprisingly bright even in daylight)
Perhaps this could be a tool for the travelling photographer? It weighs nothing and takes up the space of a deck of cards. It should sell for around the $300 mark.