Ever since the Ubuntu One cloud service played an important role in Ubuntu 10.04, a new prototype of a KDE client has become available. A port to Fedora is also in the works.
Kubuntu isn't as good as it could be. That was the conclusion developers came to after version 9.10 was released. Project Timelord should now address that concern.
We know by sitting strapped in our seats that all electronic devices are required to be shut off during startoffs and landings. But during longer flights it's no problem working on your notebook -- as long as WLAN, Bluetooth and 3G devices are nixed.