Yeah, Melly made a tool called ASCIIPaint.
It's pretty rad.
Here's an image I made using it. The first of many.
(god, click it. Click it before it dies!)
Follow thread, app development and make your own art by getting the tool from here.
I have no idea what this looks like to people that don't immediately get how the picture is composed. As a long-time pixel artist, I find this method of work very refreshing because the pixels are LARGE and the symbol characters smaller, so there's a degree of reversal of pixel art methodology to this. Which probably means I'll make more art for it.