The labour movement is more often making history than celebrating it. Making our history accessible is one thing, making that historical record something we can all contribute to is something the web (in it’s 2.0 version) has made possible.
http://www.activism.ca/ is the online place to record the history of your union’s struggles (or anyone else’s for that matter).
The site is a Wiki, meaning (like the online encyclopedia Wikipedia.org) it is a collaborative effort amongst everyone who signs up. You can not only enter information about, say, your local’s recent strike, but you can contribute to articles on broader topics. So, for example, if your union has recently had an organizing or health and safety victory, you can enter the story of those victories in topic areas covering union organizing or workplace health and safety. Link the stories of your union’s struggles on your site.