As spelled out in my original Call for Venue, August 1st is the closing date. At this year's YAPC::NA, the YAPC BOF drew some interested parties from Texas who were considering a bid. I also believe Boston.pm were going to re-submit, but I haven't heard anything from them recently.
Did you attend this year and have a blast? Can you keep YAPC::NA going? We need you to make it happen next year.
If you have any questions, post them below.