Hi!
I just bought a 6515 and I have had Palm, Ericsson 900 and Nokia 9210i before.
I'm very happy with the 65115 although I think that taking away the WiFi was silly, now many have heard rumors that it comes back in the 6700.
I' have no idea but I think the GPRS is good enough although I sometimes miss the networking ability.
All the functions are great, it is very sensitive to being dropped on hard surfaces. Mostly the telephone small speaker breaks because of that. Probably a poor soldering or design.
Anyway I have repaired it and will again because it such a great device.
The 6700 will not be on sale before april in Sweden and that usually means just before or after the summer.
All the best
Mac