It's a minor update, but the Android 2.0.1 SDK just came out, mostly consisting of little bug fixes (Bluetooth, resource allocation, that kind of thing). Alongside that, there'll be an OTA update for the Droid in "the coming weeks."
The Android 2.0.1 update should be out by the end of the year, but Droid owners (the only ones lucky enough to play with Android 2.0 at the moment) will also get an OTA update with a few Droid-specific fixes. We're told these include improved camera autofocus (thank God) and better voice reception (although in my experience the Droid's reception is stellar). We'll let you know when it's released, which should be before New Years.