Who's Who? is Comic Book Beginner's Info very simple article where you can attach faces to the name (and/or names to the faces). Think of it as Flash Cards.

Please note that these are not complete lists because A. This page would take forever to load and B. You will more than likely learn the rest of the characters as you read through the books! These are just the main ones you are going to frequently encounter. :-)

SpiderMan:

Mary Jane Watson: