There's a nifty piece of software called http://www.artrage.com/ that is not expensive and is a hoot to use. You definately need a tablet with it though. You can make your own stencils and I get a perverse delight in spraying virtual glitter onto cartoon people or using the metallic features to draw gold crowns...or teeth.
It's really boring here today. I'd rather be somewhere else...but where?