The American Association of Physics Teachers Summer Meeting 2012 at the University of Pennsylvania in Philadelphia was held from July 28 through August 1.
Here are links to what remains of the meeting.
Amateur video of the important addresses
GoogleDoc of session-related website resources
AAPT's SM12 Philadelphia Conference Page
The Twitter hashtag used for meeting-related tweets was #aaptsm12.
If someone knows of other AAPTSM12 residue, let me know in the comments.