I've activated the Lucene search now on the following wikis:
enwiki enwiktionary enwikiquote enwikibooks enwikinews dewiki dewiktionary dewikiquote dewikibooks dewikinews dewikiversity eowiki eowiktionary eowikiquote eowikibooks ruwiki ruwiktionary ruwikibooks ruwikiquote sourceswiki metawiki sep11wiki foundationwiki commonswiki specieswiki grantswiki
Will add the rest shortly, though probably with non-ideal configurations.
I've added Image: and Category: namespaces to the default search set on Commons.
-- brion vibber (brion @ pobox.com)