As promised my first impression about the Plasma Netbook Reference.
First boot took "very long" but at least I had an amazing netbook interface with great effects running really smooth on the N270 1,6 GHz processor with 1GB ram. All in all really promising!
Downside: WLAN was not working and it was not possible to start an application that required root priviliges (like software management).
So I changed the root password (I don't know if that was the best idea). Now I was asked for the password but the app didn't start anyway. After the reboot WLAN worked. So I updated via konsole with yast2. The Netbook Reference is KDE SC 4.3.5. After the update everything worked great (WLAN, amazing desktop effects, start of every app, ...) Only one minor: Maybe it would be helpful for new users to have the logout/shutdown button in the panel. But this isn't software for new endusers anyway so it doesn't matter.
In the next step I tried to update to 4.4.70 but then KDE didn't start anymore (nothing happend after the login screen). As this should be the device for my wife (and she prefers a rock stable system) I decided to install OpenSUSE 11.2 with KDE 4.3.5. As the netbook reference is a on-stick-version I will try it some day again without any effects on the hard disk to give useful feedback to the developers.
All in all it was a good experience and very promissing.
BTW: Where can I get the beautiful grub menu and splash screen?