added a mention of WikEmacs

README.md

@@ -360,6 +360,15 @@ While everything in Prelude should work fine in Windows, I test it only
 with Linux & OSX, so there are Windows related problems from time to
 time. This situation will probably improve over time.
 
+## Share the knowledge
+
+[WikEmacs](http://wikemacs.org) collects useful resources for working
+with GNU Emacs. Please, take the time to peruse and improve them as
+you accumulate knowledge about Emacs. Prelude makes this especially
+easy, since it bundles
+[MediaWiki support](http://wikemacs.org/wiki/Mediawiki.el) + the
+settings required to access WikEmacs right away.
+
 ## Known issues
 
 Check out the project's