This was just related to me. This is the best link for the easiest way to update the radio on the phone. This adds the Droid visual sequence, wifi hotspot (will have to pay for this one), 720p video and whatever else was supposed to be included on the first OTA that was stopped.
Follow this link for the file and directions. It also covers getting all the way into the phone to set up rooting but all I personally wanted was the radio update at this time, still not comfortable rooting.
Droid Incredible Froyo 2.2 Leaked OTA version
This does NOT involve any rooting whatsoever. Just follow the directions EXACTLY and you should be fine. Mine worked without a problem. Just remember, when yous tart the process and it starts working, DO NOT TOUCH IT! Let it run its course and install all of the software or you run the risk of damaging the phone.
Again, this is specifically targeted at nonroot users like me that do want the newest radio but do not want to root.
Further, this will NOT prevent you from receiving the new OTA's as they come down the line. Nor should you have to backtrack on your radio version when the new OTA comes down the line. At least that is what I was informed of.