The set reports and pictures are starting to come in from Randy’s Donuts. From the scene, James told Collider on the phone:
My friend – let’s call him James — said that filming at the location lasted between 45 minutes to an hour and there were tons of production assistants and production people around the set. That’s the reason why we don’t have a new picture for this article…he never felt like he could take out his camera and get the shot.
Anyhow, James said that he saw a stand in for Robert Downey Jr. (Tony Stark) on set and that he watched Nick Fury race up to the donut place in a blue government car and he got out and walked to his right to get a better view of where Iron Man would be. The camera was on a crane. James said it appeared that Iron Man was going to be in the donut hole on the roof and that Nick Fury was yelling at him, but he couldn’t hear what he was saying.
He also reported that Sam Jackson was in the same costume as the end of the first film – a long black trench coat.
Iron Man sitting in the big donut? Here’s some confirmation via People.com: