Deathly Hallows director David Yates confirmined in an interview with the LA times that they have chosen the place to split Deathly Hallows. Finally!!!!! Though Yates said this could change during editing (Are you kidding me!?!?!?) right now they are spliting the movie shortly after the scene where Harry, Hermione and Ron are captured by the Snatchers after being chased through the woods. Yates goes on to say that the split will be a cliffhanger, something the Potter series has yet to see but makes sense in the storyline.
If you would like to comment on what you think this scene is go to: http://www.thehdroom.com/news/Split_Point_for_Harry_Potter_and_the_Deathly_Hallows_Films_Chosen/5040