WikiWiki
This Midrange/Wiki/400 is not the only Wiki/400 effort (although it is one of the few wiki's dedicated to the iSeries that are actively maintained).
Wiki defined
Wiki is not an acronym for anything, it comes from Hawaiian "Wiki Wiki" meaning "quick." The term means either the web site with the content, or the software used to create it.
The Web site is a collaborative work of many authors, similar to a blog in structure and logic.
http://www.webopedia.com/TERM/W/wiki.html
Other Wikis referencing the 400
C2 Com
http://c2.com/cgi/wiki?RpgLanguage
http://c2.com/cgi/wiki?DumbTerminal
Editors Wiki
http://texteditors.classichorseman.com/cgi-bin/wiki.pl?EditorIndex
A bit dated AS/400 perspective.
Joerg
http://www.joerg.cc/cgi-bin/wiki.pl?action=browse&diff=1&id=BigSister
Nyetwork AS/400 Wiki
http://www.nyetwork.org/wiki/AS400
http://www.nyetwork.org/wiki/list
Original Wikopedia
http://en.wikipedia.org/wiki/Main_Page
http://en.wikipedia.org/wiki/AS/400
Wiki TCL
WLUG AS/400 Wiki
Other Wikis
that may or may not reference the 400 (exploration desirable to answer this)
e Macs
http://www.emacswiki.org/cgi-bin/wiki
Gentoo Linux Wiki
http://gentoo-wiki.com/Main_Page
Linux Questions
http://wiki.linuxquestions.org/wiki/Main_Page
Media Wiki
http://wikipedia.sourceforge.net/
http://meta.wikimedia.org/wiki/MediaWiki_FAQ
Tiki Wiki
VOIP Wiki
http://www.voip-info.org/tiki-index.php
Wiki org
http://wiki.org/wiki.cgi?WhatIsWiki
http://c2.com/cgi/wiki?WikiHistory