From what I know, the white house has no set procedure to offer internships. While getting an interview is always a good sign, I have always heard of individuals who never received an interview, and were still offered an internship. So those that havent heard back yet, there is still hope!
How long were your guys' interviews?
Did they say when they would let you know by?
Also, I think the person that interviewed us will give a recommendation to his/her boss, and that person will pass the message along. Just a wild guess. Good luck everyone!