*looks for things to add*
If you don't have lots of hardware/software facts/trivia on hand, you can always start a user page to get the hang of wiki-editing. What to put on a user page? List your collection, write about how you got interested in Macs, write about neat things you've done with Macs, write how you got your Macs, etc. (As you go, it might jog your memory. "Oh yeah, that was a neat thing about X. Does the X page have that info? I guess I'll add it...") The same kind of stuff you do here, except it will be saved in an easily-found location. Take a look at my user page.
Don't be afraid to stub an article in, even if you don't have a lot of information (or time to edit) right now. (Or take look at the list of current stubs, and see if there's one you can add even a little to.) If you start something, that might be impetus for someone else to jump in and roll with it. Maybe you can scan box art for something and upload a thumbnail. Maybe you can post a screenshot of some software. We need pics for many models of Macs...if yours is in good shape and you can get a decent picture, that would be helpful. There's
lots you can add!