According to a user on popular forum NeoGAF, the PS3 motion controller will include a Nunchuk add-on.
The user known as “ichinisan”said he’d seen pictures of the Wand and Nunchuk. He also claims the add-on has an analog stick and X and O buttons, plus the L1 and L2 buttons are underneath the D-Pa and that it’s as long as the Wii’s version.
The Wand will also feature “one very big buttun on top”; with the trademark facebuttons of X,O, Triangle and Square add-on; and a trigger know as “T”.
We should get some more information concerning this rumor at GDC this week. Exciting times.