Sheri, I have to 2nd Kathy's advice and strongly recommend the iMotion speakers. They are on our travel checklist every time we leave town. Not only are they great to have in a hotel room (remember the cocktail parties at PIP), it also double as a battery charger.
I would also invest in a car charger if your airline of choice uses that type of power outlet. This really comes in handy on American Airlines since they use that type of plug on most of their planes.
