Pretty good summary of where the Big East is right now:
Army, Navy might hold key to Big East football expansion - NCAA Football - CBSSports.com
It looks like they are tossing around the idea of adding Army, Navy, and East Carolina as football-only members or going to 12 football/20 all sports (with a split possible in that scenario) with East Carolina, UCF, and Houston in order to get the best possible TV deal.