I'm planning on one a night leading up to the release day.
Didn't some site have a timeline going? I think the release order is pretty much correct, except with the two Iron Mans together before Incredible Hulk.
I think Hulk happens "at the same time" as Iron Man 1 and Thor happens at the same time as Iron Man 2. (That last one I'm pretty sure on, since Agent Culson leaves Tony under the watch of Black Widow as he goes off to take care of something else -namely to go to Thor's hammer.)
Obviously, continuity-wise, Captain America happens "first" since it takes place in the 1940s and the ending takes place presumably shortly before CA is recruited for The Avengers in the present.
Here's the Timeline.
(I had not refreshed myself on it before making the above post which comes from memory.)