Inspired by the popular "Did You Know Gaming?" trivia series, a fan created a segment called "Did You Know Voice Acting?" While mostly talking up info from video games, they also delve into other mediums.
Here's a show he did based on Spider-Man voice acting.
(Marvel Part 1 was about the Avengers and touched on Spidey a little bit. Part 3 was about the X-Men and didn't touch on Spidey.)
Edit: Here's a link to Part 1, which as I said, has some Spidey voice acting trivia in it.
http://www.youtube.com/watch?v=JO8fb9Ppdog