I can charge it on the PC and Windows 7 registers the controller but that's all.
Supposedly the Motorola Camera Connection kit and USB Controller Charging cable (or generic equivalents) are all you need.
Basically, what happens is that I constantly have to have my controllers connected to the PS3 via the mini USB cable. Once I unplug them, they seem to last about an hour before they die and are required to be plugged in again. I've had this particular controller for about 1.5 - 2 years or so. It's not very desirable, to say the least!