The second XBOX2 looks cool. I like the big glowing green X on it. The others look like crappage. All the PS3 concept designs look bad except the silver circular one.
Here are some more possibilities for the Revolution. The one in the lower left of the picture is all wireless controller setup with Micro HDV.
And just for those Nintendo fans who love the LEgend of Zelda games, check out these screenies from the new Zelda game!
and here are come monsters!