I have heard very little, but I do know that MHS group musical theatre (Rhythm and Harmony) got a callback.
UPDATE: 2012-05-29 Angie Wheat is reporting that MHS got "second" place in group musical theatre--haven't received confirmation. Also, I think this may mean they will not be on the Saturday showcase at the Lied... but perhaps they will? again, awaiting confirmation.
UPDATE: 2012-05-30 Confirmed by Harold Easton-2nd. No, they won't be on the Lied for the final showcase. But yay for being one of only two group musical theatre I.E.'s to get a callback! Claim that 2nd place with honor.