No doubt about it, P90X is the hottest at home workout program available right now.  In my opinion it is a much better marketed version of my "Nicholas Wood's Fitness Boot Camp Workouts" e-book workouts.  The nice thing about P90X is that you can take the dvd's with you and follow through with the workouts on your trip.

Of course, if you don't want to spend as much, you can go to http://www.WorkoutsOnTheRoad.com and for only $20/mth you can follow along with our online hotel room workouts!