Not that this was really much in doubt once Tex-OK Conf decided to stay together:
BREAKING NEWS: Pac-10 Officially Invites Utah - SBNation.com
The Pac-10 is expected to invite Utah with a press conference announced for Thursday with the official announcement.
The Pac 10+2 will at least now add the Inter-mountain West markets of Denver and Utah and for the middling Arizona schools, they aren't forced to compete against top-notch competition (except in skiing).