Just got back from it! I'll post some in depth thoughts later as I need to let if marinate but it was a fun movie, a little exposition heavy in spots but I enjoyed it overall. I thought the film's pacing was too quick, things didn't really get a chance to breathe and considering Alan Taylor's comments on the deleted scenes, 10-15 more minutes would have been welcomed. Lot's of complaints about the humor but I didn't mind it except for the intern guy who was completely unnecessary. Malekith was rather bland, some of his backstory was cut but I don't know if that would have made a difference. Kurse was very cool though as a henchman.
I loved the first Thor and I feel it's the better film, TDW is flawed but fun if not kinda hollow. In retrospect in seems Marvel may have meddled quite a bit with this one starting with them hiring Patty Jenkins to direct and then parting ways over creative differences, changing composers, editors and the rumors of Alan Taylor butting heads with them over the edit.
Quick comment on the mid-credits stinger:
[spoil]So the Aether is delivered to The Collector (Benicio del Toro) and it's revealed that it and the Tessaract are actually two of the Infinity gems. Didn't really expect that so I wonder which gems these two relics represent? I suppose the Cube would be the Space Gem. (EDIT: Kevin Feige has confirmed it is the Space Gem/Stone.) A lot folks seem to be hating on this scene but I liked it and thought it was cool to get a taste of the GotG world.[/spoil]
Side note, anybody seeing this in 3D there's supposed to be a sneak peek scene show from Captain America 2. Anyone who sees it please report some details! EDIT: Reading around, sounds like it showed the whole elevator fight scene along with shots of Sharon Carter (Agent 13) and some Winter Soldier.