A MediaWiki extension for showing new talk page messages on all projects of a wikifarm.
Developed by UltrasonicNXT for Brickimedia (http://www.brickimedia.org), but should work well on any simple wikifarm setup.
There is just one config variable, $newTalkGlobalDatabases. It needs an entry like this for every wiki in the farm:
"<wikiname>" => array( "db" => "<wikidbname>", "link" => "<urltoarticle (ie "http://wiki.farm.com/wiki/")>" ),