Harper's former username, Silesia. That one was cool.
Chankama, MrZucchiniHead, Elbatrop ("portable" backwards, has a nice ring), HoLoCroN, Beedubaya...
I don't know where my username came from. I registered three years ago, and I can't even remember how to pronounce it. Lately the username I tend to register with is Jazzed.