I'm not gonna tell you which program I just bought, but suffice it to say, I like it. Here's a quick (20 minute) down-and-dirty pirate concept drawing I just did with it, and then finished up in Photoshop. The thing I like most about this program is that it so closely mimics the hand drawn "feeling." The pen drags on the Wacom tablet in much the same way a pencil, or eraser, or brush does. I know this sounds weird, but it really does feel like you're drawing on paper. And, most importantly, it allows you to get your ideas down quickly. This is a very liberating experience for a digital tool.