From a month old article on temple-news.com:
In field hockey and women's lacrosse, the American AC schools will be part of the Big East Conference for 2013-14. http://temple-news.com/sports/2013/04/3 ... -big-east/
I'm assuming that the AAC men's lax schools will be part of this arrangement as well. The article doesn't mention men's lax because Temple doesn't sponsor a men's team.
The field hockey members:
Old Dominion (affiliate)
Women's lacrosse members:
(cross posted in the Big East forum)