I am pleased to report that I passed my interview for US citizenship on Oct 26.
It was in the San Antonio district office. I drove down from Austin, and arrived 1.5 hours early. I took a chance and went in anyway. There is a metal detector and X-ray machine. Cameras and cell phones that have cameras are prohibited - you will have to leave them in your car. Regular cell phones are OK.
I took: my existing passport, my previous expired passport, the green card, the appointment letter, my tax transcripts.
There had been some changes to the N-400 form since I had filed it - I had made two trips overseas and my wife had become a citizen. I copied and pasted the relevant form PDF sections into Word, and typed out all the details, and updated the calculation about how many days I had spent outside the country in the last 5 years.
The security staff took away the appointment letter and had me sit down in the waiting room.
After about 20 mins, the examiner came down to the waiting room, called out my name, and we went up in an elevator to a set of private offices.
This happened to be the same examiner who conducted my wife's interview in September. He was polite and professional. It took about a half hour, most of which was spent going over all my immigration papers dating back to when I first came to this country 13 years ago. There were lots of questions about when and how I entered and left, and what I studied and worked as, and when. Then he went over the N-400 form, line by line, asking me the same questions as those on the form, and initializing next to them when I provided the answers.
The actual civics & history exam was straightforward & quick - he printed out a list of ten questions, of which I had to get six correct. He read them out aloud, and I got the first seven correct, at which he stopped, since I had passed. The questions included: The name of the Chief Justice of the US Supreme Court; the two senators who represent Texas in the US Senate; what the Emancipation Proclamation was; the name of the national Anthem, and some others. Then I had to read out a printed sentence: "I bought a blue car today" and hand write another sentence that was read out to me.
All of the above was in English, and would be easy for a person who spoke English and reasonably prepared for the exam; I imagine that non-English speakers might find it difficult.
Then he announced that I had passed and had me sign my name onto what will become my certificate of naturalization. I will actually become a US citizen when I take the oath of naturalization. I don't yet know when that will be. I will "receive a letter" directing me to appear at the oath ceremony "sometime in the next two months". As of 11/5, I have not yet received this.
So that was it! Somewhat anti-climactic after all the anticipation. I am looking forward to the oath ceremony. Best wishes to all those still in line.