I saw that this guy over on AO is selling arcade logo keychains and thought I'd let people here know. They look pretty sick IMHO and he has versions for most cabs. Definitely ordered a few for myself. Check it out.
http://forum.arcadeotaku.com/viewtopic.php?f=35&t=33397
http://forum.arcadeotaku.com/viewtopic.php?f=35&t=33397