Sony's motion controller, dubbed the 'motion wands' by enthusiasts, was first shown at E3 2009, though numerous patents filed by Sony hinted at its existence prior to the event.  Sony's motion wand consists of a handheld controller with face buttons and analog triggers and a glowing LED orb at the end of it.  Using the PlayStation Eye to track it's movement, Sony's Wand is designed with enough simplicity that it offers minimal input lag but is advanced enough to offer full 1:1 motion tracking.  The PS3 can track up to four motion wands at once, and offers enhanced features if using two wands at once or a wand and DualShock 3 controller. 

Initial reactions of industry professionals to the PS3's motion wand were mixed, especially in comparison to Microsoft's more progressive Project Natal, which doesn't involve a controller at all.  What the PS3's solution lacks in innovation, though, it makes up for with familiarity - Sony's motion wand is designed very similarly to Nintendo's Wiimote.  This helps Sony push the device to software developers who are already accustomed to Nintendo's controller, and ultimately helps sell the controller to consumers looking for an HD version of the Wii.