as u probably know u can upgrade ur firmware urself without those nokia service centre by using phoenix software! but some might find it difficult or don't want to risk having their mobile hanged, then try this link
http://www.nokia.co.uk/nokia/0,1522,,00.html?orig=/softwareupdate
PS: hope its not a double post!
cheers!!
btw i've got a 6630 and i wanna change, what u consider me having : a n80 or a SE p900i or any other??