i just tried to sign up using the code, but it didn't work. I emailed and will let you know what they say. I think maybe the code isn't valid with the 2 week free trial, but I couldn't see how to sign up without the trial.
ETA: I just tried it again and it workout. So I'm in for 3 bucks! I'd love to do a workout now, but I have too many other things to do. Darn it. I hate it when life gets in the way of my workouts.