Actually, My base is a mix of V5 and V7. The Verizon WIFi sharing app is just something that can be added in. The core along with most of the drivers are from V5 still.
Waze works extremely well. I use it myself when travelling. One thing that i've noticed though is that the Fathom's GPS lock usually is terrible at best. I've got a fix for that now. I'll be posting a new thread about it, but I'll load the .cab file up here too.
[Tweak] ULTIMATE!! aGPS cab (GOOGLE or NOKIA server!) Generic UPDATE 06/08/10! - xda-developers
It's the "Ultimate Generic Google" .cab on the thread. It works amazingly well. Went from 2 - 3 minute locks to just under 10 seconds on a cold boot.
As for tethering, I'll do some looking into it. I haven't found much yet, but I'll see what I can find.