I recently read through the Hobbit again, and my exact thought was there's no way this could all fit in one movie. Some of the things on your list represent weeks. And that's not counting all the journeying in between!
So, happy about two movies? Yes. But I guess I'm in the minority in that the more I've reflected on the LOTR movies, the more I think they were tainted by Peter Jackson screwing up the story. Seeing characters who weren't even in the book show up in this trailer - uhg.
Frankly, the stuff that Gandalf was up to when he left probably deserves an entire movie of its own. Trying to shoe horn it into a complete story, split into two, could be disastrous. I really hope I am wrong about this, but I simply do not trust Jackson with the material.