Odd update: I've just arrived in Stockholm for the Netroots Nation Sweden conference, and flew in via Amsterdam this morning. What do I run into in the Amsterdam airport, but an exhibit demonstrating the very pendulum wave thing that I posted about the night before. (Bad iPhone photo at left.) Bizarre coincidence.
Include your pet's photo in our rotating archive by sending it to firstname.lastname@example.org. Make sure you put "pet" in the subject line, and tell us something about your pet (goofy, touching, whatever you like), and we just might write a post about it too!