Wow! This program is tops! Awesome awesome find. It's like... Yeah, wow! And here's another screenshot of it too, with the color mixer up and the layers panel on the right. And Batman, because I did a little Batman sketch with it. :)
Wow, that's a nice find. The brush strokes are smooth throughout and the colour blending is awesome.The only thing I'm missing is support for custom brushes. I'll definitely be playing around with this a lot. Cheers man!