I like the little Drupal dude that they use as their logo ...now that's a wicked graphic! I don't have one yet either, but this is a pretty good idea me thinks ..haha
I'd have never considered it untill I read this thread and now I'm wondering how I go about creating a few mascots and what they'd be. Hmmmm, food for thought.
Actually I'm considering a stuffed animal to actually accompany me on various travels, sort of like the Gnome for travelocity. In theory when there are events that I cannot attend then it could be mailed to someone that does attend.