If you want valuable insight and opinion about the shifts in the media world, check out eMedia Vitals. Our friend Rob O'Regan recently interviewd Aerva about the new solutions for better events through digital interaction - Read "Bringing Social Media Into The Ballroom"
The point is that there are opportunities and obligations for event producers, industry associations, etc. Opportunities for more valuable interactions before, during, and after events. Obligations because we have no patience for wasting time - and sitting through just one more bad PowerPoint (without the ability to influence the topic)!
Digital-Out-Of-Home is the "arena" to watch... it is everywhere... intersecting all media marketing.
One recent example is how our client Yahoo "got the party started" with Twitter, txt2screen, pic2screen, and a contest. See more info HERE