DoctorMO is organizing a group buy for some really good looking case badges with the Ubuntu logo.
http://ubuntuforums.org/showthread.php?t=522464
These are different from the stickers from System76 and the marketing project by Jenda. I've pledged support for 100 units to the MissouriTeam to be distributed at installs, demos, and membership drives. However, if you are interested in a few of these, please consider supporting this project.
Read up about the project on the MassachusettsTeam wiki:
https://wiki.ubuntu.com/MassachusettsTeam/Projects/AluminiumCaseBadges