my upgrade went pretty much without a hitch. Dell 1350 wireless here. my XPS is pretty much loaded too. I had to reload outlook 2002 due to slight startup problem. All device drivers installed fine except for Firewire which said I needed to go to Dell for a device driver.
PS: This probably made a difference too.- I chose the "upgrade" path of Vista install as opposed to the fress install. So all my XP drivers were seen.