I think adf is right in his rebuttal of hrw's suggestion that the Z is dead - Angstrom is mainly, as I see it, a learning platform for people who are very serious about linux and need very little documentation; OpenZaurus was gaining traction and seemed quite popular and stable in its final moments, but I don't think there are enough Angstrom devs to maintain its vision of being available for so many platforms. Sharp and Cacko distros are a bit like PalmOS - useable, stable, easy to get to grips with, but somewhat stagnant. pdaXrom community is vibrant if a little haphazard?
Nokia, at least, provide some support for their products, even if it's simply maintaining a core platform for people to build on (which Sharp had done long ago but abandoned). The Nxx0 platform isn't truly open though, and they seem to be quite happy to abandon the 770 which isn't really that old and shouldn't be too hard to keep some level of support for - though at least they heard the outcry when they first tried to sweep it out of the way!
I do agree with HRW that the Nokia tablets or similar cutting edge linux handhelds are going to gradually kill off the Z platform simply because of its features, the 810 is the first to make a real dent in the Z's useability advantage of having a keyboard. If the 810's successor improves the keyboard, then I think we'll see more Zaurus owners leaving the Zaurus behind, especially if the Z continues to lack a really good modern web browser.
Personally, I use both my Z and 770. When my laptop's X11 driver broke after a kernel update and I needed to ssh in to it, I picked up my Z (running angstrom), its keyboard make fixing reinstalling the nvidia driver a doddle, but without an external keyboard for the 770 it'd have been painful!
