C. Robert Cargill (a.k.a Massawyrm) writer for Ain't It Cool News amongst other things was a guest on the Slashfilm podcast this week and he mentions that he just watched an original print of TESB for a friends birthday at a surprise screening in Austin in the past week or so.
He mentions Tim League so it's probable it was at the Alamo Drafthouse.
He's stats talking about it about 1 minute into the podcast: http://www.slashfilm.com/2010/10/26/ep-121-paranormal-activity-2-guest-robert-cargill-cool-news/
Also his tweet about it: http://twitter.com/Massawyrm/status/28481654293
I'm not on the twitter but if anyone as any questions about it I'm sure you could tweet him or just email him.
Who owns the print is anyone's guess. But kind of cool.