Jamie Beck and Kevin Burg have made some very cool and wonderfully subtle animated GIFs that may possibly be the most interesting use of that technology that I’ve ever run across. Sadly, a lot of what they’ve done with it isn’t that exciting (lots of clothes and hair moving gently in a breeze), but there are a few examples (such as the one above) that are real gems. If you’re interested you might check out “Far Better Than 3-D: Animated GIFs That Savor A Passing Moment”, a nice article on their work (which is I where I learned about it). You can also see more of their animations here and there.