Just a few hours ago draw challenge hit the Nokia N900 on ovi store. It is ment as a game of art and it should bring relaxing music and nice graphics. The point is... you can't draw pictures by yourself with this app but fill them with color. first videos are looking very nice and I hope we can test it ourself if someone (a very neat person ^^) uploads it very soon.
P.S.: please also check my collada 3D viewer thread in the linux/ maemo applications section and write or upload useful things (like the app ;-)
errm.. here's a video (too short but long enougth)