If you have an Xbox 360, go and at least try the demo.
This Gamespot video shows what you have in store, but it is still full of surprises.
Feedingedge blog
Wikipedia - yes thats right
This blog is a personal set of views and should not be taken as anything else but that.
7 Days, 7 bike rides, target achieved. Each ride has been a little longer starting at 1 hour and up to 1 hour 20. The initial ones had my heart rate up at 155, but now its a more sensible 135-145 range. A good workout, but still enjoyable.