Here is an idea, but not sure how well it'll be accepted.
Inside the cup, names of current/active developers/contributors,
represented using tag/keyword cloud[1] form. Using a combination
of code check-in count and importance of check-in, contributions
on mailing lists, other factors to make it fair to dictate size
of names[2].
On the outside of the mug, maybe a simple elephant mascot
accompanying the simple words: "Genius Inside".
--patrick
p.s., This thread is quite distracting as it is fun to read.
[1] http://en.wikipedia.org/wiki/Tag_cloud
[2] Of course, with an opt-out option if certain contributors wish
not to have their names printed.
