Creative's TravelSound Zen V is a docking system for the Zen V Plus. It's a really cute flash-based MP3 player that doesn't cost the Earth and will keep you rocking through the night. Four AA batteries power the beast for 24 hours, which is plenty of time to get some serious drinking and sunbathing done. AA batteries are globally available, so even if it powers down after playing a few bands' entire careers you can keep on rocking -- and who doesn't take batteries to festivals these days?
If even these speakers are too big for your weekend in a rocker's tent, maybe some dinky but useful alternatives are more up your flagpole...
