Check this out. I am testing this at work for our conference room. This this is sweet and thought it would be a great alternative to what people are using as an interface device. Notice this communicates via 2.4 GHz radio frequency.
Only downside is the price tag.

4 Powerful tools in one: Wireless Presenter, Laser Pointer, Multimedia Remote, and Mouse in one tool
Trackball Mouse: Integrated mouse trackball offers enhanced control over other presenters
Convenient One Touch Keys: Switch between applications, launch the internet or access emails at the touch of a button
Wireless Freedom: 2.4Ghz technology offers increased range, and decreased interference - control your presentations from up to 50 feet
Power Management: On/off switch preserves battery life