A slight deviation from the spirit of the challenge, but about a month ago I started saving screen caps of every one of my Draw Something rounds. I just dumped them into a tumblr,
drewsomethings.tumblr.com
I'm not proud of all of them (my "Macarena" is positively shameful), and some of them lose a bit of artistry and meaning in the form of static images rather than playback of the drawing process. But I've been pretty fascinated with how my style has evolved through my playing "career".