He has tweeted A LOT about the movie, here's some:
One about the end scene, says it's been spoiled months ago. So we don't need to pronounce it now, but we all know it.
Also another interesting bit:
"Also, I see people complaining about scrotum chin goblin king. Why?" and then later: "I can see the design conversations at Weta happening until Jackson had to say he wanted a giant ballsack on its throat."
Not really a spoiler since we have seen the design but honestly it didn't trouble me. Maybe in action it looks different, I don't know.
"No character in 2012 has stolen my heart the way GOBLIN ON A ZIPLINE has. I want to know more about him. His character. Where is he from? Where's that zipline take him? What happens when he gets there?" And I have no idea what he's talking about.
"The only real PG-13 moment for me was the dwarf head. That took me by surprise big time. Gollum's scary too." Must be the prologue.
"Rivendell scene worth it almost exclusively for an amazing Christopher Lee verbal takedown of Radagast. And just Lee in general. "
"After 30 seconds screen time of THE HOBBIT, I'd totally pay $15 to see alien Lee Pace party with a raccoon with guns." So not 3 seconds after all.
Some negative bits: "I think Jackson's desire to please the fans hurts this movie to some degree. So much of HOBBIT is nice (Ian Holm, Elijah Wood, etc) but it's just for fans and nothing else. It's a fun time. It's not LOTR. The thing that hurts Hobbit the most is LOTR. In every way. It's not super egregious, and it's nice too see Lee back, but more EE type scenes. Also lots of stuff in the trailer (but clearly film 1) isn't in the movie. Think the movie really needs a few more Freeman in Shire moments."
And some Q&A:
-What do we see of Azog?
-A hell of a lot.
-Good to hear! Was expecting some quick cameo. Does he look anything like Bolg?
-You are in for a surprise then.
-how much of the movie does the white council plotline take up and how much screen time does Rhadagast get?
-5 minutes and 10.
-Is the scene with Bilbo buying fish in? I heard it was cut.
-Nope. A lot of the Gandalf stuff is film 2.
-Were there any EPIC moments in the movie?
-Thorin gets a ton of big hero moments. Jackson shoots him like a God.
-Do we get to see any daily Erebor life or does it jump right to the action?
-Very briefly.
Regarding blockbusters of the year: Hobbit > Skyfall > Avengers/TDKR but still, LotR > Hobbit
Ah, sweet. How was the Battle of Azanulbizar?
great. The reason it's pg13.
Ooooh! Any gory moments?
thrown dwarf heads
Azog decapitating on of the leader dwarves?
yep
Do we glimpse The Balrog at Azanulbizar? He is, after all, the real reason the dwarves didn't return to Moria
nope
Soooo....how was the radagast/dol guldur storyline?
brief but I dug him. He gets stoned.
Does the necromancer make an appearance?
sorta. Not really but not nor either.
if you had to say your favorite scene of the movie what would it be?
Riddles.