Allcam CP1 WinCE

The CP1 is a handheld computer and pico projector in one small package. It runs Windows CE, and so supports Windows Office, Audio/Video files and more. It's got a built-in mouse-pad, but it also has mini-USB connector for keyboard and mouse (or any other USB device). It's also got a PC speaker. They claim 4-hour battery life. The CP1 weights a bit more than the usual pico-projector at 998 grams.

The CP1 costs 194GBP (around $320 US) , and it's available now from Amazon in the UK.