Centrino support may be possible using a loader from Linuxant http://www.linuxant.com/driverloader but that may not appeal to you as it means using windows drivers.
There is also http://ndiswrapper.sourceforge.net/ which does the same thing and is free software, built in wireless isn't a major issue as I have a pcmcia card so if the laptop has a slot then it will be no problem :)
True, although IIUIC using a wrapper makes it possible to use faster access (brain going soggy but I think it's called 802.11g or 54g for short, 54Mbps access) for which AFAIK no linux drivers yet exist. So could be worth a look sometime?
Syd