I've been wondering this myself.
I ordered with Lik-sang, and because of the firmware issues they've made the decision not to order thier units until the 'official release'. I'm of two minds with this. One is that I feel I've been snooping around here long enough that I know how to handle most of the problems that could occur with the unit, and I don't want to wait any longer. The orther part of me wonders if it would be better anyway to wait and hold my order with Lik-sang so I get a more 'improved' unit.
I would suggest that you should order with Lik-sang so that when the 'official release' comes they'll send you your unit, but they're being really sketchy on this issue. They haven't posted an update about this in months, and I'm starting to wonder if GPH is actually ever going to meet the requirements that Lik-sang has made.
So, I would suggest that you buy your unit now from a distributor that preloads the latest firmware on the system (I think gp32z.com is doing that) and most of the problems will be fixed with that firmware. Then, when the next one comes out, go ahead and upgrade.