You can see my current lists in different formats (html, wikisyntax, csv) here:
Only Mediawikis can be added which provide raw, text-only stats on a page like Special:Statistics?action=raw or title=Special:Statstics&action=raw. Example: 
This is the case for Mediawikis up from a certain version (i think from 1.5) on. Mediawikis that cannot be added because they dont know "action=raw" yet are definately old versions that should badly be updated for unrelated security reasons anyways.
50 newest pages added to Category:MediaWiki
<DPL> category=MediaWiki ordermethod=categoryadd count=50 </DPL>