Just did my Walk-in biometrics in Orlando, FL. I was all worried about what they were going to say and I told the guard at the entrance that my appointment was not for today, and before I could start on my long excuse, he just said: "It's OK!". lol...
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Application sent on 10/17/12 to Dallas Lockbox.
Email/Text confirmation on 10/24/12, Routed to Vermont. I-797C received on 10/27/12.
Biometrics Appointment received on 11/05 for 11/29. Walk-in done on 11/13/12