Yesterday myself and my wife oath was completed. I had my interview on 18 Sept @ 2:30 but I didn't received the oath letter since it was too late. My wife got a call from Atlanta USCIS this Monday and was called for the oath ceremony on Wednesday. My wife requested them to have oath with me. USCIA call us again on Wednesday morning and scheduled oath for both of us on Thursday @ 1:30 PM. I never received the oath letter in mail.
Well, for my it was a long time ago, but normally the IO will ask you for your ID, passport. IO will have on his/her desk all the package that you sent before; at this time you are allow to add any information that you consider might be relevant on your case. Then after this part is done IO starts asking you questions about your case, like dates, names , cities, organizations, etc....most of lawyers advise to answer only what they are asking, not to use many words...................just go to the point. Also of course go well dressed and bring all the papers that you think might need.
I had my oath ceremony at Cadman Plaza on April 5th, 2007. Reached there around 7:45 AM when they had already begun seating people inside the court room. Once they seated everyone, they had people come in and sign their Naturalization certificate and verify their information (date of birth) and sign their full name. People were seated and also called in the order in which they had arrived. First come - First serve basis.
My I-140 was filed in February 2004. The National Visa Centre, in its letter dated 24th June 2010, informed that they had completed processing of my petition seeking immigration to the USA and had forwarded it to the American Embassy/Consulate at New Delhi.