Get fit and blast space invaders at the same time

This is definitely one for the 'what will they think of next' category. A company called ProForm has come up with a elliptical trainer that is also a video game -- you can actually kill aliens while you pedal away. The game is actually built into the machine, so it's not dangerous like playing a Gameboy on the machine would be. AND the best part is, the harder you work, the easier the game is -- you'll be so focused on winning the game, you'll hardly notice how much you're sweating.

I was skeptical at first, but let's face it -- working out on a machine can be b-o-r-i-n-g! Anyway to break it up and find extra motivation to work hard sounds like a great idea to me. What do you think?.