The S2 fitness bike explores an unusual route to get you fit – “virtual reality.” There is a display mounted at the top of the fitness bike which lets you experience different types of riding environments, as well as play some games. The pedal resistance even changes with the terrain on the screen.
If that doesn’t make things more challenging, you can also connect online with the S2 to compete with friends in a “side by side” competition. Of course the bike will also give you the usual real-time feedback that you would expect with a fitness bike – it will show you the distance, time, heart rate, calories burned. The S2 is available as a recumbent or a regular upright bike for around $8569 (steep anytime but especially in this economy).
Still pricey but less expensive at $1699, the X-Bike 1000 is an excercise bike that works your entire body. Its handlebars move from side to side, makeing you feel as if you’re actually riding a non-stationary bike. The bike also has seven levels of resistance that will help strenthen your arms. Though the price tag is steep, Lance Armstrong uses one of these, so it might be worth a look.
(thanks to ChipChick for the recommendations)