Lapizuli - 1:31 pm on Oct 8, 2010 (gmt 0)
I use and love GIMP but believe there's a bit of a learning curve if you're not already familiar with photo editing software. And if you are, they've upped and changed all the names of the functions and effects on you, so you will have fun figuring out which is which (it's not really hard though). But it's amazingly powerful. I do not illustrate much on the computer, however.