Last Updated: Aug 30,2010
If you return to stock and get the OTA update you will get the new antenna version and hboot as well. But you won't be able to re-root using unrevoked. Rather, you'll have to download clockworkmod and superuser and install them via the recovery. unrEVOked has instructions on how to do this on their forever page: public:forever [RootWiki] scroll down to the bottom and look at "Reinstalling an official recovery."
But why do that? Why not download the antenna update and a 2.2 ROM. There are ROMs that are now available on xda that are based off the official 2.2 stock update. Check out:
[ROM] Incredible Sense/Froyo v3.21.605.1 *Official Release* (100% stock, rooted) - xda-developers and
[ROM] Virtuous v2.3 (8/29/10): Stock Sense/Froyo v3.21.605.1 w/Fixes & Enhancements - xda-developers
The second is basically stock, with the most obnoxious bloatware removed (really, it's just moved to a different directory) and a few minor enhancements. There's no need to return to stock and get the OTA with these ROMs.
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