I took PS3 to India and I was not sure if it supported 220V. I went out to purchase a step down transformer to get 110 for it. When I came back I saw that kids had already hooked PS3 to 220V directly and were playing little big planet. I was shocked, thought PS3 is destroyed. But I left it to it and am convinced that it does work on 220V. I noticed that no where on console (bought it in USA) it said 240 volts.
Its been two years now, its still running fine on 220V in India.
I bought a PS3 with Move bundle in the US this month (Feb 2011), and was a wee bit apprehensive about using it in India on my return last week. Reading all the posts above gave me the courage to plug it directly into a 220 V outlet (of course with a plug socket that suits Indian pins).
It worked perfectly, and I've used it for more than 2 hours at a stretch. The console was just as warm as it was when I used it in the US. Sony should be flogged for deceiving customers into believing that they had better buy one made by Sony India, which costs nearly 135 USD more (Rs 23500 plus Rs 1800 for the Sports Champions game, when compared to Rs 19000 when bought in the US)