Hi,
A new episode of the MediaWiki podcast "Between the Brackets" is out: this one features Evita Hollis, who runs the GE Wiki at General Electric - possibly the single largest MediaWiki installation within a company (I could be wrong about that, though).You can listen to our entire conversation here:
http://betweenthebrackets.libsyn.com/episode-57-evita-hollis
-Yaron