Lance Phan has been using Blender to create some very well made caricatures of people who send in their photographs. His work is really solid, he calls it ‘cartoonizing’ people and has definitely developed his own style.
Pictures speak much more then words so you can find his work in his imgur gallery at : http://imgur.com/gallery/n84Cq
You can also find more work on his facebook page at : https://www.facebook.com/lancephanart
Send him your picture and he might cartoonize you too!