Two different PlayStation 3 products were announced at the Sony press conference. One will contain a 20 GB hard drive and the other will contain a 60 GB hard drive. The latter will also have support for Wi-Fi and Memory Stick media. 
At Sony's press conference in Los Angeles the PlayStation 3 is detailed further. A new controller (DualShock 3) was shown which resembles similar looks as the DualShock 2 controller for PlayStation 2. There is no force feedback but it will have motion sensing capabilities.