I'm running Ubuntu Feisty on my home desktop and Ubuntu Edgy on my home laptop .... I have XP on a partition but rarely dip in to it these days.
David - have you tried Ndiswrapper for your wireless card? I remember I had some problems getting this set up in Edgy and needed to disable the default wireless card configuration in the OS before I could get Ndiswrapper to work.
If it's any help - I can see if I can find the relevant article in the Ubuntu Forums.