I was searching for anybody that went through interview cancellation in Philadelphia due to weather in February 10, 2010 and found your previous discussion. I interview appointment was obviously cancelled like yours and now i'm still waiting for them to reschedule my appointment (it's been 3 months!). Did you ever get a new date? What was your appoach to get the new date? USCIS customer service center and infopass has not been helpful so far.
My case was for permanent residency, but I wouldn't think this would be different.
I'd really appreciate your response! Thank you very much!