Hey all,
just checked out a book from the SPL (I LOVE the Seattle Public Library) that is an excellent source book/reference for retro, Jetsons-like character design.
It's called "Cartoon Cool: How to Draw New Retro-Style Characters"
ISBN 0-8230-0587-9
Very "Dexter's Lab", "Jetson's" and the E-Surance girl style.
http://www.amazon.com/Cartoon-Cool-Draw-Retro-Style-Characters/dp/082300587...
Recommended!