Well a new challenger has appeared. At $30 each, these Sifteo Cubes still aren't quite at the level where you could expect every customer to already own a set (or include a few in the box), but I could imagine quite a few interesting ways you could combine these with boardgames.
The tipping point draws near, folks. Some day all this stuff will be cheap enough that every boardgame can have electronic components up the wazoo and every videogame can have tablet support and action figures, and instead of distinguishing between videogames and boardgames we can just refer to them all as bideord games or something.
Or maybe that's a bad idea and none of that will happen because it's actually more fun to just tackle your friend while holding a PlayStation Move.