Today there are a few reports online about a HBP trailer being screned at ShoWest.  According to the article, “Dumbledore also has a line of dialogue that definitely isn’t part of the book– ‘Voldemort has chosen Draco Malfoy for a mission.;’ ”  The article also states:

Alan Horn asked at the beginning of the presentation if we’d all forgiven him yet for delaying this movie’s release from last fall to this summer. The answer is no, probably, and new footage like this doesn’t make the wait any easier. But at least we know we’ve got something to look forward to.