If you want to Spin at home, I have a whole entire series of Spinervals DVD's and a really great spin bike. Check them out, it goes by real fast when doing it like a class. Coach Troy really kicks my butt :-) They are kind of expensive, but I think of all the workouts I have done with them, it was money well spent. I even converted some of them to run on my iPhone and when I am away vacationing, and can find a spin bike, I still do them.
My favorites are:
1.0 Riding with Team Clydesdale
6.0 Riding with Iron Girl
28.0 Aero Base Builder VI
Though I have a lot more.
http://www.spinervals.com/