I was hoping someone could help me with my Bluetooth PAN questions.

First, could someone explain what is accomplished by setting up a Bluetooth
PAN connection, both a NAP and PANu are available for my Bluetooth phone? If
someone could explain each of these and what use they are, that would be
great.

Secondly, after enabling Internet connection sharing and connecting to my
Sony Ericsson Z750a phone via a PANu Bluetooth connection I get a globe and a
PC icon on my phone screen. I've talked with both AT&T and Sony and neither
can verify that I am sharing my internet connection on my PC with my phone.
The goal would be for me to get on the internet with my phone but not go
through AT&T. This does seem possible but I don't understand enough about
Bluetooth PANs to be certain.

Thanks.