At its Leipzig Games Convention press conference today, Sony unveiled a wireless keypad peripheral that attaches to the top of the PlayStation 3 controller (presumably into the mini-USB port). The keypad also features a "touchpad mode" for mouse input. Pricing was not revealed, but the device will be released in 8 different languages.
It's worth noting that MadCatz released an attachable thumbpad for PS3 in April 2007.
Update: Added official keypad images (see gallery below). Does this thing double as a codpiece?
PlayStation.Blog clarifies that the Wireless Kepad includes a mode that turns the key area into a touchpad, allowing users to control an on-screen cursor with their fingertips, tapping to activate a link. The keypad also features two short-cut buttons, enabling quick access to the XMB's "Friends" icon and the "Message Box." The pad also can be paired with other Bluetooth devices (e.g., a smart phone) and will be released in late November.