They have one... not sure what you mean?
There is plenty to get your heart pumping in several of the programs. Check out Inferno for some serious cardio action.
Yes, You can always "discover" different workouts, so you can be in one "program", but you don't have to do the workout associated with the program. You can click on discover and choose any other workout you want.
Just did my workout through Roku today. Working fine for me. I use Roku every day for Daily Burn, and having had an issue.
Is there anywhere else we can view this? I'd really like to see a graph of my improvement. I can't remember my numbers from previous weeks so I can push myself to beat it.
What about PS3?