Writer's Block: Where Names Come From
rabidpanda came from a Nike Presto shoe commercial I saw back in high school. It showed this little animated panda dancing across the screen all happy like. When it got to the front of the screen, it wigged out! I couldn't stop laughing for a good long time. The 460 portion was just a number that stuck in my head for no real apparent reason.
Edit: Found a link to the actual commercial! http://tinyurl.com/Rabid-Panda