Great Resource!
We have photos kicking around of every robot at all of our events since at least 2006. I know they aren't detailed CAD designs, but even just a photo can often be an excellent resource (especially since bluealliance no longer has photos
)
Even cooler would be if people could tag and/or rate images & designs with things like "pneumatic gripper", "6WD Traction Drivetrain", "4-bar linkage", "Electronics Plate", "Joystick Controls" etc so you can easily search for a particular kind of design (no matter what year).
If there would be any use for a ton of robot photos, let me know (PM or email), and I can zip and send them to you.
(Though I suppose it would have to be more of a navigation like Jason was suggesting or the search style with tags).