Gingerbread requires a 1GHz processor and 512 RAM. The D1 can't run it. Sorry.
Nobody knows that.. in fact, Dan Morrill, one of Google's lead Android techs all but said that the statement that "Gingerbread, or 3.0, or whatever won't be available on phones with sub-1ghz processors" is untrue.. stating "I can make up crap too."
[see:
http://www.droid-life.com/2010/07/02/google-shuts-down-gingerbread-rumors/]
Multiple Google personalities and spokespeople (including Koush who many of us put our Android lives in the hands of) have said that Eldar Murtazin (the guy who originally broke the store about Gingerbread and the lack of support for the '2nd generation' android phones) has no idea what he is talking about...
[check the update in this article:
http://www.droid-life.com/2010/06/3...d-3-0-details-released-bad-news-for-droid-1/]
..bottom line, nobody has confirmed
OR DENIED that D1 or any other '2nd gen' android phone won't get 2.2 or 3.0 or whatever may come between...
so... just like with 2.2 we will have to avoid the rumors and wait for official (or officially leaked) word from Google, Moto, and HTC...
..that said, back to 2.2 speculation