Twitter user blue13x posted a screenshot of an update notification for Ice Cream Sandwich on a Galaxy Note. His device is most likely the international GT-N7000 version because his Twitter profile lists his location as the Netherlands. The AT&T version will hopefully see the same update soon.
This is not a vanilla version of Android because it comes with Touchwiz on top of it. The update is 318.19 MB and lists a new S Note app and S Memo. It also links to the video below.