I just got my new 8310 yesterday and just coming to terms with the wealth of features and possibilities available to me. Just made the jump from a sony ericsson k750i so I'm mightily impressed with the stuff on here!
Held off buying the 8300 since i wanted the gps feature on 8310. Haven't had the chance to use it yet but I sure will. I'm planning a trip from London to Croatia next year as I've always done with an onboard nav system so I'll be sure to let everyone know how I got on.
That's about it really. Just a big thank you to all the people posting on here. Helped me get my head around a few things before I became part of the BB family.