Saw it today in IMAX 3d. The 3d was the best I have seen in a while! You really get the sense of flying/falling when Spidey is swinging between buildings.
The story was OK to good. However, it seemed like they tried to mash three movies into one. There was the Electro movie, the Green Goblin / Hobgoblin movie (which was he?) and the preview for the Rhino movie. As a result, it felt like there were three endings to the movie.
Also, the mid-credits scene was completely out of place.... and there was no after-credits scene.
I would give it a B-.
And, yes, I will get it on Blu-Ray 3d.