GTCOCalComp have been making digitizers and flatbed plotters for decades and I have to admit I was surprised to hear they are still around. They have a product that might be of interest for educators and other groups that wish to control and annotate presentations wirelessly. The InterWrite MeetingPad 400 is an active digitizer pad that runs up to 40 hours on a single battery charge and is designed to work in two modes. The first is the Interactive Mode which lets you work directly with the projected slide and use ink, draw figures and just about anything you can do with a Tablet PC. The second mode is the Office Mode which allows you to use the MeetingPad with Microsoft Office applications so you in effect are writing directly on the projected slides when used with PowerPoint. The cool thing about the MeetingPad is how it becomes a sophisticated presentation pointer when it’s not used for annotating. Bluetooth is used for the wireless connection and the company claims a 300 foot range. $585.