i would suggest NOT to wait.
there are two things that could happen:
-you are waiting-waiting (but hungry for a device) and one day you see sthng nice and forget what you originally wanted (yeah-really bad!!!) ... and just beacause waiting for so long and being inpatient you just end up with a machine with XY OS, which is far from linux devices. and the next day you will try to turn it back, but late, man.
- other option is that you are waiting, mr A is also waiting, mr B, mr C,,,
everybody waiting for a keyboard device, and nokia just... instead of working on a new products ...(yeah...this is the worse situation coz' now we are speaking about the only company..) drops the linux machine line.

Pls do not forget that a faster Palm with WiFI cost like 200 euros more and
the Zaurus line just finished in the US (it is only sold in Japan acc to the net)
so, tooo much waiting can end up swhere else...

just to finish, i was not waiting, and if there will be a new model... much better, but only really bette rthan than this: i will also go for it, if not, i will feeeeel good that i already have my machine and was not wasting time on waiting and waiting for sthng which did not worth the time and risk.