I know since I have SPRecovery installed that OTA is blocked. But, if your rooted, you should be able to get back to a stock image if you need to.
But you couldn't get a stock image of 2.1 until someone backed it up and posted it or how?
Wouldn't you be forced to "wait" until 2.1 was extracted and posted by someone so you could manually update to it?
And for those wanting to go back to 2.0.1 "non rooted" so they could receive the OTA update, wouldn't you they have to do it "before" the update attempted to be pushed to their individual phone or can they force it by going to "update" on the droid to receive the OTA?
No you wouldn't have to do it before the update. And no you wouldn't have to wait till it was extracted to manually update.