I have created a Wiki for PSPmod using the Wikia site. I am working on the "List of PSP Games" but I'd like to see some other people run with this idea and help me create content there. If you want to start adding custom firmware changelogs, definitions for things like "pandora battery" or "IDstorage" or "Flash 0", pages for individual games, etc. then this would be awesome. Contact me for the login details if you're interested.
Also, I have contacted webtek about adding a Wiki function to this site. I don't know if this can be done or if it is feasible to do but we can move anything we've created away from Wikia when that time comes. There's no reason I/you can't start work on this now though.
Here - PSPmod Wiki