Let's see:
Baltimore Book Festival
http://www.bop.org/events/eventdetail.aspx?eventId=3642
Miami Book Fair.
http://www.miamibookfair.com/
And of course I'm leaving out Chicago as well
http://www.chicagotribune.com/extras/printersrow/
Last year, I met the Sony team at Texas:
http://www.texasbookfestival.org/
And there was a rumor that Sony was at the Aurora, IL fair a couple years ago.
http://www.midwestliteraryfestival.com/