The MAngband Library: http://mwiki.danlib.net
It took longer than I expected for the Library to be worthy of the public, due to hosting issues that were eventually resolved. I know I said "a couple weeks" just about a month ago, so I decided to just put it out there now instead of accumulating more content. So, enjoy, and add stuff as you see fit
You will have to register to edit or add things (like with the forums) but I don't see that being a problem. Use your full name and continue the tradition of MAngband contributors from years past, please.
It's a collaborative thing, so your document will probably be edited, renamed, refactored and/or moved at some point after you post it. There's a full edit history for each page just in case that gets abused.