I just read an article about the moto droid that their rooted phones will receive the ota. So it must be possible, though I don't have details on whether or not our phone will do the same. It also didn't mention if the ota removes root or not.
FWIW I hate Verizon right about now.
Edit: Yeah, what he said. You need the stock recovery is the word on the block. Although no one has actually received an OTA since we've gotten root so I'm not sure what they base information on.
Sent from my HTC Incredible «•»Rooted/S-off/Skyraider 2.5.2 Vanilla«•» http://www.unrevoked.com/forever
HTC Incredible«º»Rooted/Nand unlocked/Cyanogenmod 7 RC1/Android 2.3«º»