They are coming out with a Wii cyberbike soon. I'm considering it...I never make it to the gym and without some added "fun", I get bored even just thinking about working out...just bought the Wii and already got Wii Fit plus, the balance board, EA active, Fifa 10, PES 2009, etc.
I'll respond to your workout games question. I have several workout games and my favorite is EA Sports Active More Workouts. The More Workouts does a better job of implementing motion control IMO than the original. There is not as much switching between the resistance band, leg strap, hand held nunchuck etc. It seems to have a better flow than the original. Check out this site for some good reviews of wii workout games: http://www.nutwiisystem.com/best-wii-exercise-games.html hope it helps!