Excellent job! I'm sure it will look AMAZING when you render it with 1,200+ images. Out of curiosity, I ran the logo through my "home-made" photomosaic code with about 1,000 images from Team 97's 2005 season. It came out pretty decent:
The coloring in yours is better - I think AndreaMosaic has some nice code for slightly adjusting the color values of the small images to match the large one more closely. I don't think I'm going to venture into that coding nightmare... Mine renders in 3 minutes, though.

(I pre-reduced all the images to 640x480 to reduce loading time.)
Here's the big one if anyone wants to see the details:
http://web.mit.edu/scolton/www/logo.jpg
(I've got webspace on a fast MIT server - I'd be glad to host your final render if you'd like.)
So yea you can make a pretty good photomosaic out of any large set of images...and it is an excellent thing to display in pits or give to sponsors as a gift. AndreaMosaic works great - or you can try your hand at writing a custom program. (Cummon all you potential/actual comp. sci. majors...it's fun!

)
Again, great idea, Greg! Sorry if I kinda ruined the show by posting the apple one a few hours ahead of you.

...didn't mean to.
__________________
MIT Mechanical Engineering
>> College Mentor,
Team 97: Cambridge Rindge and Latin School with The Edgerton Center, MIT Mechanical Engineering, Bluefin Robotics, and Draper Laboratory
>> Alumnus, Team 527: Plainedge HS