Comment 15 for bug 296663

This isn't a fix by any stretch of the word but it is a viable workaround.

Apparently Fujitsu-Siemens had enough complaints about this and added an option in the BIOS to choose whether the laptop will have the WiFi On or Off by default or, whether it will remember the last state it was in.
Naturally this involves flashing a new BIOS and IIRC the flash utility ran under Windows (Vista).

At least after that I was able to have WiFi under Ubuntu/Kubuntu.
The WiFi device was identified and the correct drivers were loaded.

Again, this is in no way a fix but it at least is a semi-acceptable workaround.