At TMC's ITEXPO, Yahoo's Jeremy Wadhams revealed not only that Yahoo! has deployed Asterisk corporate-wide, but the challenges he faced in adopting Asterisk throughout the organization, including several Yahoo! branch offices , several acquisitions of other companies, including Dialpad & Overture, as well as the usual corporate culture and politics to contend with,

Jeremy demonstrated Yahoo!'s interesting custom web application which integrates their flavor of Asterisk with web-based email & voicemail, corporate directory, as well as the ability for users to reset their voicemail PINs themselves - the bane of every IT administrator's existence.

One interesting tidbit was that it he figured after reaching 25% penetration, the last 75% would be a cakewalk. It didn't turn out that way. Here's a video teaser of the keynote. Alas, the video doesn't reveal what happened. You should have been here at ITEXPO to hear his interesting tale.  Hey, I can only capture so much video on my iPhone.