2.2 Tethering, my experience
It will be interesting to see how this plays out. I installed the canonical 2.2 (Froyo) last night and noted that the tethering option was there in settings. Plugged into a PC, touched "tether", the PC immediately showed as connected to "Network" and the Droid showed tethering as active. Brought up the browser and got the Verizon "call to pay your bill" page offering $20 for 2Gig (better than nothing).
So, today, I called. The sales rep was puzzled that she couldn't find the code to add tethering, so she escalated me to a tech. After struggling with it for a while, the tech said that not only should tethering work, but hotspot should work as well and he was puzzled that he couldn't add it. He'll call back tomorrow after he has gotten that fixed. We'll see.
As a sidebar, while working with me, he had me run through the *228 update, which, now, connects to phone mail and not roaming update. Not sure what that's all about.