^ I'm doing the P90x right now, since the man took my license and I don't want to risk driving back and fourth to the gym.
Its a pretty good program, and it'll whip you into shape if you aren't already. 6 days a week, with one rest day.
The workouts are pretty intense, and are all a type of high intesnsity interval training, meaning you only get like 3 or 4 short breaks (60 seconds or less) throughout the entire hour of working out.
Its cool for me because its takes all of the work out of it, all you really do is eat clean, and do the workouts.