As I recall from reading about the recent ASO/UCI 'Peace Treaty', ASO starting in 2011 is no longer an invitational event. Apparently UCI standings will dictate who can play, not the bile level of the organizers.
UCI says dispute with Tour organizer is over
Has any more information leaked out about this and other terms of the agreement?
Fwiw, I rather like the invitational nature of ASO's events. Competition - even among sanctioning bodies - is a Good Thing.