This is the 40 GB (/80 GB) model motherboard lacking PS2 chips:
http://farm3.static.flickr.com/2027/1802652525_aa0c26b42a.jpg
This is what was on display at CES:
http://www.generation-3d.com/UserImgs/imgs/Console/Playstation3/sony_ps3shrink.jpg
This is the original PS3 motherboard design:
http://www.generation-3d.com/UserImgs/imgs/Console/Playstation3/sony_ps3original.jpg
http://farm1.static.flickr.com/185/463096475_9dde805cd4.jpg
It has certainly gotten smaller and is said to be more efficient.







