Ragnorok, I know just what you mean, and I'm just as guilty of jumping the gun on this one. My History: Psion did a good job of giving people support and an upgrade path - they even released the 3mx to breathe life into the 3 series when the 5 series was already around! However, they saw the writing on the wall and I guess they had to make the choice between being elbowed out of a niche market by serious volume players, or exiting gracefully.
Then I found the HP 620lx, upgraded to a 680, then 720, and now a 728. It's a dead line, which is a shame. HP has a long and proud history in handheld PCs, possibly peaking with the 200lx, or for others (myself included) the 7xx range. I think they made a bad move in getting out of this market, but it was probably good business sense at the time.
The Z will never be left out to dry in the same way as either the Psion or HP community has been, and the single reason is open source. I still am amazed at the work that OZ and Pdaxrom have achieved... Of course, this doesn't mean that I don't wish for an improved Zaurus coming soon, and my wish list as ever is for a bigger screen and more integration whilst not losing the battery life.
I cross my fingers