My graphic designer buddy Matt Kuhns and I occasionally chat on the subject of "make your own (free) fun" -- basically, the notion that you can have fun in creating fan-based projects for your own amusement. That anyone else sees them is immaterial; the idea is that your enjoyment comes through the creation process.
Along those lines, Matt decided to try to put together a graphic timeline of Spider-Man comic book titles. In his own words, "I did this timeline of Spider-Man comics mostly because I started thinking about all of the different launches and relaunches one day, and it began to seem like an intriguing information design problem."
While he didn't include every Spider-Man title ever published, he's hit all of the most significant ones, I believe, and the result is an interesting look at Spider-Man's publishing history...
Like any chart or graph, you're free to draw your own observations and conclusions.