I see all these new faces, the Summer/Fall 2012 participants.
Just be patient. For the Summer 2012 applicants, expect to hear final decisions as late as April/May. The internship program works very hard to get to all of you guys. And yes, many applicants do not get interviews and still get accepted into the program. Be cordial and honest in your interviews. Make the interviewer want to get to know you better.
I suggest you guys start looking for summer housing very soon. Summer Housing in DC (especially on DC college campuses like Georgetown and American U) is very expensive (I'm talking about from $800-$4000 for 3-4 months and sometimes that does not include utilities) so plan accordingly.
Remember that you will also be competing against ten of thousands other interns from other DC area internship programs for the best DC metro accessible housing. The summer brings an estimated 20,000 interns to Washington DC every year!
Tap into your school's Career Development Offices and alumni networks for affordable housing asap. I cannot stress this enough. Then browse through DC Craiglists and look for potential places to live, but be weary of scams and spam. The month before your internship starts will be the one of the most hectic times of your lives because you have to find housing, buy your clothes, buy your plane tickets (if you live far away), etc.
One last piece of advice, when you get here, be humble. Show your office that you are a team player and a hard worker. Be humble. Be humble. Be humble. Ok have to go. Good luck everyone!