Pitt sends an acceptance letter first class mail. A copy of the letter is given to both of your interviewers and they have the option of contacting you. Both of mine emailed me a few days after I received the letter.
It's a super school and wiil probably be where I matriculate. Pittsburgh is an ok city but it is cheap and within a days drive to DC, Phila. and NYC (Oh, and West Virginia :wink: Plus, it is a true city with cultural events, museums, restaurants, etc unlike somewhere like Rochester, MN !
Good Luck!