I plan to reprogram mine and am going to try to achieve as much commonality throughout the programming with my 396 as I can. How common I can make them, I guess, will depend on how the 996 handles multiple site systems. I downloaded the manual, but haven't had much time to look at it.
I was a bit ho-hum about this unit until I realized that in the scheme of things, it is really more revolutionary than evolutionary. I rank it with: The scanning radio itself; The synthesized scanner with keypad and display; The Trunktracker scanner; And now, the GPS enabled scanner.
I think, although it will sit on my desk most of the time, fiddling with the GPS part is going to be interesting, especially tweaking the "circles" figuring out where they need to be, how big, and how much they should overlap.
It will also be interesting watching the "active channel display" as channel usage changes.