They're big non-transforming 12-inchers geared mostly for the kids; so far the only characters they've done are Optimus and Bumblebee. I got both of them, they're pretty neat and probably the only non-transforming movie toys I'm gonna get. They got touch-sensitive sound FX (and some push-buttons) - when you 'walk' them along on any surface, they make "stomping" noises, hence the name Cyber Stompers.
Optimus is pretty cool 'cuz he's got a big light-up cannon with its own sound FX. Not sure whether this one has a 'voice' variant or not - I honestly can't tell whether it's Cullen or a Hasbro-appointed VA, but anyway I like. His eyes light up, too.
Bumblebee's also pretty cool, though his face looks a little weird - more like a G1-type face than that mouth-cap in the film. He doesn't speak, but he makes tire-squealing noises and plays a snippet of the G1 first-season theme song.
The buggers are loud, too.