Here’s a good one for camping, the E! Power System designed by Eureka! It comes with three factory-installed 12-volt outlets which can be used in the N!ergy tent which is also from Eureka!. With those three outlets you will be able to power your devices like your DVD player, MP3 player, hair dryer, vacuum and more in your camp. But in order use, you will need E! Power Pak a power supply which is not included, it is use to power the E! Power System. The Eureka! N!ergy tent that include the three 12-volt outlets (pre-wired) will be available for $249, additional 50 bucks for the E! Power Pak.

[Thanks Evelyn]
[via Ohgizmo]