Birgus Latro has posted a write up and several videos looking at the Cubelets KT01 Construction Kit from Modular Robotics. This is the first production run of the Cublets and was limited to just 100 kits.

Cublets are a modular robotics kit that consists of 20 magnetic blocks that can be snapped together to make an endless variety of robots with no programming and no wires. Each cubelet in the kit has different equipment on board and a different default behavior. There are Sense Blocks that act like our eyes and ears; they can sense light, temperature, and how far they are away from other objects.