I added a bunch of new links today. The first two are the most valuable but all have good things contained within.
Forgotten New York is one of the coolest sites for pictures of the five boroughs bar none. It's creator, Kevin Walsh, has been doing hist site for ten years and recently he wrote a book called "Forgotten New York". Go to the "Street Scenes" section and check out the Staten Island articles. The man's collected some amazing things and gathered good information.
The New York Public Library Digital Collections is a great picture resource. Just enter what you'd like to see in the search and go for it. Unfortunately there's not a lot of good information attached to the pictures. Sometimes there's a note scribble onto the image or there's a caption indicating date or location but more often than not it's all a little vague.
The last two sites are similar to my own. They're personal sites with things of special interest to their creators. Nonetheless, for the interested Staten Islander they do provide a wealth of interesting pictures from across the decades. They also have their own sets of links to other Staten Island biased sites. Check them out and if you find fun sites on your own, let me know and I'll put up a link.