Hello all,
wikidata has made it on the toolserver today. The database is called "wikidatawiki_p" (don't ask me…) and its is home on s3. Because I guessed that many joins to it will happen in future, I created also copies on all clusters with the exception of s6 and s7 (will happen later); so you can join it in the same way as commons.
Sincerely, DaB.