Thanks to USA Today for many more HBP promos, including shots of a very sad Harry and Hermione; your first looks at Slughorn and Lavender; Ron with his chocolates; Draco with his wand at the ready; Dumbledore in his office; and a clearer shot of David Yates with Dan and Bonnie at the Burrow. You can see them all below.
When the hi-res pics are up (which should be soon enough), I'll have them in a new post.