no problems yet...
I have actually just started. i needed to get the nic working so i could d/l stuff without having to boot into windows.
I am getting fedora right now. I am going to try the athlon64 version of it and see if it works. I am not sure what is going to happen with neverwinter nights under it though. I will probably have to go with the 32 bit version but who knows.
Everything seems to work fine in windows 2000. I have a wierd problem with my usb mouse where when I boot up it will not load it. I have to unlug and replug it several times before it will work.