My favorite Pin-up artist is Joe Pekar, why? Because he does pin-up toons and he inspired me to do the same. I love his style of work, it's not too cartoony nor realistic. He paints using a variety of colors, especial in the shadows- doesn't use blacks, use more blues or purples which goes hand in hand when using flesh tones or complements with warm colors.
Pekar site includes a great body of work of different genres inspired from familiar pop-culture characters, too sexualizing mythical women, and other diverse types of women. All the classic arch-types of you would expect from pin-ups. You can check out some of Joe's earlier works to developing one of his pin-up character's in 3D. You can see his work from sketchbooks, earlier works in oil paint, to now digital painting using Painter.
Get a glimpse of his mini-tutorial, giving the viewer or inspired artist to create your own pin-ups. He has a blog set-up to let his fans know what he's working on. If you really like his work a couple of his art books are for sale on his his site.
Check him out at http://www.joepekar.com/
His pin-ups are soo cool and amazing!
FRAC!