we just got the bluetooth update for z1 it has made it so we cant bypass the z1 probably same software in z2 preventing bypass DO NOT INSTALL IF YOU HAVE BYPASSED Z1
Moderator edit: Look here, it just changes the bypass, now after the bypass you do this:
http://www.sminntech.com/z1flash.html
All Z1's are easily bypassable. I just hope we get the Z2 soon. Sorry about the "old news" bit but this was figured out in October/November of last year or so.