The PS3 in no way, shape or form draws 380 Watts.
It has a powersupply rated at 380 Watts. There is a massive difference between max draw and actual draw. Same with PC's, they might have a 500+Watt powersupply - but they never draw that much.
Actual figures for the 40GB PS3 can be found here:
http://kernelslacker.livejournal.com/124350.html
The short version: Idle = 132 Watts, in game is up to 175Watts.
(Figures for the 60GB PS3 can be found here: http://www.hardcoreware.net/reviews/review-356-2.htm )