You know, I had an idea... one keycap from each of some of Geekhack's favorite keyboards, to make up the logo. (A vector version of this would be ideal for obvious reasons, and someone could probably make that in Illustrator or something, given pics of the keys (not me, I suck at that sort of thing)...)
So, 1391401 is obvious...
What else? I'm thinking... Filco Majestouch, HHKB Pro, Topre Realforce 86U, Model M spacesaver (give it a K or O, so that it's obvious that it's a spacesaver we're talking about...)
Anything else? (Actually, I think this is gonna be worthy of its own thread...)