Here is a few things to keep in mind..
The Verizon 3G app is infrastructure, thus it works with things like PSP and Nintendo DS, which is why i keep it. The Wireless tether apps are only ad-hoc for now.
From what ive been told, the verizon app loads a different firmware before running.
Now, what verizon can do and has done in the past, especially on windows mobile phones, is take out a feature like wifi hotspot in an OS, and put their own in its place.
do NOT be surprised if VZW does the same thing with 2.2 and yes, it is 20 a month for a measly 2gb on the hot spot app, but wireless tether is unlimited for 30
this is why i ONLY use the hot app for PSP and DS and the rest wi-t for root
not to mention, i am not even sure if the 2.2 is ad-hoc or infrastructure.. anyone know?