jmwrites

USNA is notoriously unhurried and deliberate (aka slow) in the paperwork end of things. Also remember, besides sending out "yes you got into NASS" packets, they are sending out "Yes, you got into USNA" packets to the Class of 2013, *plus* all the follow-up paperwork generated in that process (small forests of trees being used here...).
Be patient; the packets will show up when the time is appropriate. May not be your timing, but trust that USNA knows what they're doing. Also understand that too many (or ill-timed) calls to them can be aggravating to them, rather than helpful to you. Use those phone calls to the Admin people very thoughtfully and sparingly. Know that you are now in the application/interview process with USNA, and everything is noted (especially any contact made by mom or dad, even if on your behalf).