I differ on the opinion with Nokia's treatment of the n800/n810/n770 compared to SHARP's treatment of the Zaurii.
For starters, they are making the newer rom compatible with the older machines, to varying degrees.
Their product refresh cycle is much more aggressive than SHARP and isn't the Nokia IT's rom open source, compared to the close sourced version of SHARP? (at least the kernel part of SHARP rom is closed source etc).
About going off on a holiday, I speak with envy when I say that on my previous project with them on their backend business system, I learnt that they really do disappear for weeks if not months during the winter months to get some sun in other countries, if not to go skiing. Interesting, if not strange, culture, but hey, if they continue producing great products running linux, I don't give a hoot about how and when they spend their hols!
Lastly, I really hope they don't go the way of SHARP on the InternetTablet. It would be a great pity. Good news for us is that the multitude of umpcs or sub-lite-micro-notebook like the eeepc, nanopc etc runs on linux and so should at least keep the linux platform viable for another few years. Once enough of these products gain traction, then Nokia would have more reasons to stay the course and continue the development of the InternetTablet.