I’m happy to report that Audible, the downloadable audio book company (and soon to be podcast service provider, according to their CEO Don Katz) has signed on to be the Platinum Sponsorship of Portable Media Expo and The Podcaster Conference.

It makes sense on many levels, as Audible is all about portable audio. They are also the exclusive audiobook provider for iTunes. It’s a great boost for the event and for podcasting and portable media as whole.