Transformers Animated character designer blogs
Transformers Animated character designer and art director Derrick J. Wyatt shares concept art, jokes and behind the scenes info at his blog A Delightful Tedium.
Meanwhile more Transformers Animated concepts, and manga sketches, can be found at the blog of character designer Brianne Drouhard.
Update: Derrick Wyatt is interviewed over at http://www.coolshite.net/feature/2009/05/14/transformers-animated-interview-derrick-wyatt/ for more insights into the Animated character design process.