Both Android 2.3.3 Gingerbread ROMs have been leaked and are available to download. In order to apply the refresh you’ll have to use Koush’s Recovery Bootstrap for either Droid 2 or Droid X, according to your model.
Check out the instructions to apply by following the source links. Even thought these are claimed to be official ROMs, leaks indicate that the official roll-out is pretty close. In case you can’t wait and want to update at your own risk, follow the source links below.