I would really like to see something like mypaint ported to the N900. I would love to see the wider range of brushes and pressure sensitivity... Hmm, come to think of it, does the N900's touch screen have pressure sensitivity? I haven't found any apps that use it!

Gimp in Easy Debian LXDE works reasonably well once you go through the long and torturous set-up phase (putting your menus on one desktop and your drawing on another)...