Thomas Newton said:
Android 2.3.6 Gingerbread update rolling out to unbranded Nexus Ones - Recombu
As soon as we saw this little update appearing in out notif bar we immediately installed it. Don’t hold your breath, it’s not Ice Cream Sandwich. We can’t see any immediate benefits from installing this; there’s no official word from Google on this, but we understand that this is mainly a security patch/minor bug fix.
So tasty =) Now i look forward to it for SGS-I9000. But it's not my primary wish-release, I want Ice Cream Sandwich now ^_^

Image from recombu.com