Are Lauren and Audrina still friends?

What's up with all "The Hills" people? Weren't Lauren Conrad and Audrina Patridge like, BFFs last time we checked? Conrad and her posse including Lo, Brody, Frankie and Spencer's sis Stephanie hung out in the Hennessy lounge away from the common folk, while Audrina sat just a table away and didn't exchange a single word with her fellow "friends." Meow.