One of my favorite things about the online hockey community is everyone's interest in sharing their personal photographs. There are thousands and thousands of hockey photos taken by fans around the league, posted on sites like Flickr. Here is a list (below) of team groups I'm familiar with, but just head to Flickr (or anywhere on the net) and just start searching -- you'll find many more. Maybe join a group or start your own.
Atlanta Thrashers, Calgary Flames, Carolina Hurricanes, Dallas Stars, Edmonton Oilers, Montreal Canadiens, Nashville Predators, New York Rangers, Pittsburgh Penguins, San Jose Sharks, Vancouver Canucks
Another option if you wish to browse older amateur hockey photos is the Hockey Photo Project. I'm not sure the site is updated anymore, but it can still be entertaining to hunt through the archives. If anyone has any other groups they'd like to suggest, either on Flickr or elsewhere on the internet, feel free to add them to this post.
One thing I should add -- if you ever want to use or post another person's hockey photo, be sure to ask permission or give them credit wherever you can. Most people are happy to see their work posted on hockey forums and blogs, but they deserve to be credited for their great work!
Note: The photo above is from one of the Canucks hockey groups, and shows Marc Chouinard and my friend (and podcast-mate!) Rebecca from The Crazy Canucks.com.