Yep, I've been a VO actor for 5 years, did a couple games within the past year and hungry for more.
VO aren't generally considered "directly employed" by the industry, not like an artist, producer, director or programmer. Though there may be a way to qualify for this, it'd be difficult to show a check from EA or 2KGames, thereby proving "directly" employed, as EA or 2K sends the check to the agency, and the agency sends a check to me, minus commission. As freelance, I'd say we're really "professionally affiliated", so we'll get hit with the $500 badge fee, but can still attend. (At least, I think so.)
Of course you can always get in for "free" by working at the show, too, which I did once back when I was host of Microsoft's floor presentation for the launch of Xbox Live at E3 2003. Got the job because I knew what a lava gun was in Mech Assault, and their other final casting selection didn't. But if you're working at the show, it's tough to leave your area. And being a host means you can't move one inch, as Itagaki, Molyneux and every other developer is waiting in the wings for the next presentation.
As for this year, I have a friend working some magic, so I skirt the entire issue. I know another VO talent trying to get in, though, but given that the April 25th deadline has passed, he'll get hit with $500 whether qualifying for "directly employed" or "professionally affiliated". If I find out one way or the other, I'll post an update to that effect.