Years ago I began a level design site in google sites. I've finally migrated to my own domain. Mediawiki is not really the best solution. I was looking for a static site solution but since I don't know how to make a site without a ready to use CMS I decided to install mediawiki.
Henry's personal library
JK2 has one of the best level designs of all time. In may articles I used it as a prime example of good level design.
The rest of the site is not about level design.