To change the subject for a minute, have you thought about just calling this XCoin? I think Darkcoin was called this originally but I still really like the name. X11coin is a bit unwieldy, plus I like the idea of the singular X being used for amounts. For instance:

(Dude Looking To Buy A Hat): "Excuse me fine fellow, how much for that hat?"
(Dude Who Works In A Place That Sells Fashionable Headwear): "Oh, that hat: 300 X".