I still have mine! :-)
I promised myself (and the guy responsible for buying cell phones at my company) that I would stay with the 6310i until I could have a model which was just as good a phone, but which also included a camera good enough that I didn't need to drag my big Olympus Z8080 around everywhere.
My current 6310i is the fourth I've had, I've had to replace them (with phones other people have traded in) as the display glass got too scratched to read easily, but they still work as backups of course. The last time (this spring), one of the phone guys called me and said that he'd found a brand-new box in the bottom of a cupboard!