Engadget Expand speakers, Round Seven: Moon, music, media and more!

It's time for another round of additions to the speaker lineup for our big Expand event coming up in just a few weeks. You'll want to be sure to pick up your tickets so you don't miss out on these folks up on stage: Alexandra Hall: Senior Director, Google Lunar X PRIZE DJ Spooky That Subliminal Kid: Artist Victor Agreda, Jr.: Editor-in-Chief, The Unofficial Apple Weblog Raghu Tarra: SVP & General Manger, Sling Media, Inc. In addition to joining us on stage, DJ Spooky will be playing a set at Exp...