fyi, we have all these:
DNS:
root@sockpuppet:~/pdns-templates# ls -l | grep commons
lrwxrwxrwx 1 root root 13 Jun 7 2012 wikimediacommons.co.uk ->
wikimedia.com
lrwxrwxrwx 1 root root 13 Jun 7 2012 wikimediacommons.eu ->
wikimedia.com
lrwxrwxrwx 1 root root 13 Jun 7 2012 wikimediacommons.info ->
wikimedia.com
lrwxrwxrwx 1 root root 13 Jul 19 2012
wikimediacommons.jp.net ->
wikimedia.com
lrwxrwxrwx 1 root root 13 Jul 19 2012 wikimediacommons.mobi ->
wikimedia.com
lrwxrwxrwx 1 root root 13 Jun 7 2012
wikimediacommons.net ->
wikimedia.com
lrwxrwxrwx 1 root root 13 Jun 7 2012
wikimediacommons.org ->
wikimedia.com
Apache:
/apache-config$ grep commons redirects.conf
wikimediacommons.co.uk *.wikimediacommons.co.uk \
wikimediacommons.eu *.wikimediacommons.eu \
wikimediacommons.info *.wikimediacommons.info \
wikimediacommons.jp.net *.wikimediacommons.jp.net \
wikimediacommons.mobi *.wikimediacommons.mobi \
wikimediacommons.net *.wikimediacommons.net \
wikimediacommons.org *.wikimediacommons.org \
wikisource.com *.wikisource.com
commons.wikipedia.org \
www.commons.wikipedia.org www.commons.wikimedia.org \
RewriteRule ^/welcometowikipedia$
http://commons.wikimedia.org/wiki/File:Welcome_to_Wikipedia_brochure_EN.pdf
[R=301,L]
RewriteRule ^/instructorbasics$
http://commons.wikimedia.org/wiki/File:Instructor_Basics_How_to_Use_Wikiped…
[R=301,L]
RewriteCond %{HTTP_HOST}
(^|\.)wikimediacommons.(net|info|mobi|eu|org|jp\.net)$
RewriteRule ^(.*)$
http://commons.wikimedia.org$1 [R=301,L,NE]
RewriteCond %{HTTP_HOST} (^|\.)wikimediacommons.co.uk$
RewriteRule ^(.*)$
http://commons.wikimedia.org$1 [R=301,L]
RewriteCond %{HTTP_HOST} =commons.wikipedia.org [OR]
RewriteCond %{HTTP_HOST} =www.commons.wikimedia.org
RewriteRule ^(.*)$
http://commons.wikimedia.org$1 [R=301,L,NE]