Another addict, here. :) I like making "virtual" quilts as much as I like making fabric ones. (darn it!)
I just finished doing a "class in a book" called "Applique Drawing" by Angie Padilla -
http://www.amazon.com/Appliqu%C3%A9-...8927336&sr=8-1
I learned so much about where the tools are and what they do! This is one the things I wanted so much to bring into my quilting - my own drawings and the ability to mix elements and re-arrange stock blocks to make something else.
It's really the most fun I've ever had with software! :)