Here is DS's timeline
9/28/11 LOA (actual letter arrived on 10/3/11)
11/22/11 Nomination Received (letter arrived on 11/25/11. 11/23 was Thanksgiving)
11/29/11 Nomination posted on the CIS portal.
12/7/11 Phone call from Congressman to DS congratulating him on his appointment. Congressman was so nice that he made a personal call to our DS right after he got off the phone from the academy (or maybe his staff).
Although he said DS should be receiving BFE (Big Fat Envelope containing the official appointment) in a couple of days, it has not arrived here, yet. It has been 9 days since the phone call, but I think UPS's snail mail is taking longer than usual due to Christmas. BTW we live in CA.
I don't know if MOC and USNA are closed after Christmas.
So Longhorn, hope you hear from your MOC before Christmas, but even if you don't hear from them before Christmas, you will hear from them at the beginning of January, I think.