Congrats Ian.....We are near 2 weeks apart, I got mine then....I am a happy camper....I know you will too.

First thing, update the OS, I already had purchase the 1 gig Memory (thanks Frankie), I installed, then proceeded to play for a while, then to transfer all my T3 Data, Registrations, Pads, UVNs, etc.....
I started a total new folder with registrations made from the T4, and I started touching up with changing some of the sounds, Volumes, etc.....for the T3 registrations, basically to update them with better sounds, etc.
The important thing is that the people HAVE notice the difference, on the sounds....that in a very positive way.