writes "Sony has decided to call the PS3's wireless controller 'Sixaxis' as it has sensors which allow it to sense linear motion along six axes. The Bluetooth controller charges when connected via the USB cable, after a full charge it is good for 30 hours of gaming. It becomes a wired controller when charging so you can continue playing."
The Next Generation article also offers some further details on PS3 accessories: "Sony will also sell a memory card adapter used to upload data from PS or PS2 memory cards to the PS3 hard drive. That peripheral will go for 1500 yen ($13) and will be available at launch as well. A Blu-ray/DVD movie controller will also be in the accessory mix, selling for 3600 yen ($31)."