Last I heard Uncle Dave had one. Maybe he'll bring it to NJ Friday night along with the other two.
I remember first he loved it, then he hated it, sold it and bought a new X1, which he loved. Then he got a little bored with the new one and got the first one back again, but kept the second one on the side. Kinda like some guys do with women.
Like Dave, I've found it's cheaper to change keyboards once a year than wives.