The real end would come if future Zaurus hardware were to be incompatible with the Linux PDA OS's now being developed, which doesn't seem particularly likely for the present.
I agree but am not so sure that it is not likely. If a company is pulling out of foreign markets unexpectedly and focussing on their home market - they might pull that out as well.
I think hardware continuity is very important. If we look at OPIE/Familiar etc., all these projects have to fight with new devices with closed spec coming out faster than some volunteer can find out how the boot loader works, how some new chips/features are adressed etc. That is the reason why stable releases are mostly available for PDA devices that are no longer on regular sales. So, the timeframe of stable supply of a device with standard interfaces is important.
To work agains this risk, I proposed a "Zaurus Foundation" which not only supports Open Source developments (pdaXROM, OpenZaurus etc.) but also tries to work on stable hardware specs by i.e. aquiring the IPRs from Sharp and have some Asian factory produce a compatible device. And to define upwards-compatible devices of course. And do better marketing of LinuxPDAs. This won't be simple tasks for a Foundation but the Blender Foundation has shown that it can work.
Regarding the discussion of the Archos devices - for me it is more important to have a continuously available and developed PDA platform which supports standard interfaces that I can learn and work with, than different devices in different form factors (e.g. without a touchscreen and keypad) just having in common to use some Linux Kernel and some version of Qt.
Although Motorola has done a lot of efforts for the A760 and A768 to use Linux - they are not really open systems. Afaik there is now the kernel source on Sourceforge (from uncertain sources) - but that's all. You can't install software on the Phone - no compiler, no console, no ssh. Just JAVA apps can be installed. Linux inside but not accessible. This is not the approach we (ZUG) need.
So if the PDA device (mobile smartphone) gets a GSM/GPRS wireless interface (with standard /dev/modem) integrated that would also be fine.
-- hns