I think. Well, I hope.
The whitelist at http://dumps.wikimedia.org/other/pagecounts-all-sites/README.txt claims that meta.mediawiki.org is whitelisted. As is usability.mediawiki.org. As is...you get the picture ;)
Unless I've had a stroke and am hallucinating the *.mediawiki.org, we mean wikimedia. At least it validates the people who grumble the two names are too similar? ;)
Have fun,