Genius makes all sorts of computer accessories and peripherals, and has for a long time. The latest peripheral from the company is the Genius 2.4GHz Wireless Ring Mouse and it is pretty cool. This mouse would be perfect for the people that are on the road all the time that want a mouse that needs no desk to operate. This could be perfect for controlling your presentation form across the room while standing.
The Ring Mouse slips onto your finger and your thumb controls the cursor movement by using the touch area above the mouse buttons. It has two buttons that you can click with your thumb. The adapter the mouse uses for connecting wirelessly to your computer is good for up to ten meters from the mouse. The sensitivity of the mouse is 1000 dpi, which is better than the 800 dpi of your average cheap optical mouse.
The wireless mouse and an internal rechargeable battery for wireless use and comes with a retracting USB cable so you can charge the mouse and use it while you charge. You can order yours from Brando right now for $55 (USD).