If you have come to associate InFocus with high-quality home cinema projectors then let me remind you that the company does also cater to the business market. In fact, the latest model to escape the production line, the IN15, is geared for just that market, intended as a companion for professional types who travelling regularly.
The IN15 sports a native resolution of 1,024 x 768 though it will accept an input of 1,280 x 1,024 and downscale it. Inputs are limited to D-Sub and Component Video, which is fair enough as few notebooks carry DVI ports. Contrast ratio is stated as 1,800:1 which, again, is good enough for the intended use.
The real selling point, though, of the IN15 isn't its feature set, but its size. At 1.7in high, 7.8in wide, 10.6in long and weighing in at 1.8kg the projector won't put too much strain on the shoulder. One slight snag might be the price; at around £800 the IN15 is definitely going to be limited to the corporate market at which it is targeted. If you do happen to have some company money to spend then you can do so now.