A couple of concept artist have posted up their TF3 artwork on the web.

Artist Tsvetomir Georgiev has images of The Driller, Igor and some generic Decepticons.

Artist Warren Manser has images of Dino/Mirage, Prime's Trailer/armoury, Sentinel Prime, Laserbeak (with an odd ornamental penguin mode, and his pink Bbee mode), Sideswipe, Bumblebee, and the Twins.