Although Googling takes this back to at least [Register or Login to view links] and the Chinese author's [Register or Login to view links] linked in the application appears dead, I don't see this in our PS3 Downloads section yet so here goes, from the source link above:
A Chinese programmer has put together a PS3 controller driver that works with standard USB HID. That driver is called SixAxisDriver, and you can grab it right [Register or Login to view links]. Simply run the install, load the driver, reboot Vista, and your controller will be identified and will start working!
This is good news I guess, but I myself already have one of those previous drivers installed .. This would've been an exceptionally good, ground-breaking news, if this driver supported the PS3 controller's bluetooth connection, hence meaning no wires even when using the controller with a PC.