I'm on a quest for a fun, high-energy workout video. I need a good cardio DVD to do when a) the treadmill has bored me to tears b) it's raining out and c) when we're on the road and the only place to work out in is a hotel room. I've heard that Zumba is incredibly fun. For those of you that have not heard of it, it's a Latin flavored dance workout. It looks entertaining and I'm hoping it would really get my heart rate up. Has anybody tried this? If so, did you like it? Any other recommendations for fun workout videos? I've looked into The Firm, Hip Hop Abs, and P90X.