Responding to recent rumors that the 20GB hard drive contained in the basic model of the Playstation 3 will not be upgradeable, and that it will also not support wireless controllers, Sony has told GamesIndustry.biz that both stories are false.
“Both [model] configurations will support bluetooth PS3 controllers. The only non-upgradeable feature of the 20GB configuration [...]
"20GB PS3 Hard Drive to be Upgradeable - Confirmed" - 17.05.06