I'm really getting into these. I don't know if they're any good or not. . .
But, here is one I did last night. Its of one of the regular caricature posters at the Drawingboard.org. There is a really long running thread of "Caricaturists Caricatures" where you post your versions of the other guys along with pictures of yourself for them to caricature. I haven't been in it long but am enjoying it.
Anyway, here is "Bangalore Monkey". Mechanical Pencil in my sketchbook then fiddled with a little in Photoshop.
And the source image. . ..