Good question! The poster presents Oct. 14 as the opening day in theaters, with the curious addendum "And at Home..." tacked on with a date that's illegible on the low-resolution poster. But an eagle-eyed tipster (who also pointed us to the one-sheet) directs us all to VideoETA, where a Nov. 1, 2011, street date is scheduled for the DVD/Blu-ray. Trespass has an Amazon page that corroborates this as well. No trailer has yet hit the Web, though something called the Ischia Global Film & Music Festival claims to have debuted the "15-minute world premiere" of the film earlier this month with Schumacher in attendance.
Anyway, save the date, etc... [Poster via @TRESPASS_Movie]