I feel your pain--I posted about this earlier in this thread, but basically I interviewed in September and may very well be the only September interviewee left who has yet to hear anything. When I hit the 9 week mark I emailed the office and received no reply. Every time I called I got the voicemail so eventually I let it go. I finally got an email response from them last week saying my file went to the committee, and just TODAY my status changed to "a final decision". It took 16 weeks for that to happen.
My point is: don't let this drive you too crazy. I've heard people getting "final decision" statuses 4 weeks after interviewing, and then there's me, who got one after 4 months. It's a crapshoot, and it sucks, and the most important thing you can do for yourself at this point is to relax and be patient.