I for one don't like the idea. Why start now? All of the films since GoF could have used the two film treatment, but they have been able to cut enough fluff out to making them reasonably sized. OotP, was the longest book, yet shortest movie. It did feel a bit rushed, but they did make it work. I think WB finally realized if they divided it up, they get twice as much money for the same film.
What happened to the days of movie intermissions for long films? Those need to be brought back.
I can't wait to see the trailers for: Harry Potter and the Deathly Hallows PART ONE! Oh, like that won't make anybody feel like they are getting ripped off.
Part one, frankly. is going to suck. It is going to be the three kids wandering around the forest, fighting with eachother, for 3 hours. Plus I don't really see a clear dividing point.
Part two will definatley be the better film with the final battle.
Still a stupid idea though.