Hello
Quite nice gadget ... You can have it for cca 800 USD without OS. It runs DOS, Windows XP, Windows Vista, Linux ...
Not definnitelly a Z replacement but worth to look at it
http://www.mobilnaut.cz/?a/1355
Looks cool--the ad is in ...czech?.., so I don't really know what it does
It is an extensive review. What would you like to know?
In short, as far as Linux (Slackware Kill Bill) is concerned, sound, touchscreen and WiFi did not work, but the OS started and basically worked (drivers).
Win98 - a naive attempt to install, but a complete failure as a result (lame user?)
WinXP - after problems, even WiFi worked... Standard experience.
Battery test: 3.5 hours, playing movie from network via WiFi, 1.5-2.3 hours
Conclusion:
+ performance
+ price
+ price/performance ratio
+ battery
+ extensibility
- too hot under CPU load
- small (height) resolution of the display
- poor interpolation by higher screen resolutions