For those who love everything R/C, this Lynxmotion hexapod kit is pretty dorktastically awesome. While technically 2 legs short of spider status, this hexapod has excellent mobility, as 18 servos drive the legs (featuring 3 degrees of freedom) a foot per second and over obstacles up to 4" high. Oh, and it's preprogrammed to work with a 2.4Ghz wireless PlayStation 2 compatible controller.
The thing to remember here is that, as a kit, the $750 Lynxmotion BH3-R doesn't have all the polish of a retail product, but it leaves the platform open to robot enthusiasts.
Windows software allows you to customize movement over its basic programming that only supports multi-directional, multi-speed movement and 360-degree spins. Maybe you'd like your robot to do the robot, accomplishing feats of engineering that even Bender cannot fathom.