I know they go to PAX Prime because its close but is there any plan on going to PAX East? 
PAX East is the only PAX that I'm able to go to right now and would love to be at a live bombcast.

Jeff said on Formspring that he believes they missed the deadline for panel submissions, but some of them might go.

Very unlikely indeed, GiantBomb once said that they could only realistically afford one or two full team excursions a year, E3 being one of them and PAX West being the other.  
PAX West always gets more coverage so Giant Bomb can intelligently get their name out to a more effective degree. 
And E3 is obviously a career and website suicide event to miss if you're a member of video games press. 
Plus if they went to every version of each event they'd have no time to actually sit down and do some reviewing, which I and many others would probably get pissed at since that's kinda what a video games website is all about. (Excuse the ironic sarcasm, I'm just screwing around.)
 
EDIT: Bare in mind I'm going on old information. 
I haven't heard any change in their stance to events for a while and it might have changed since subscriptions went up for Whiskey Media, due to there being more money to go around.

"I haven't heard any change in their stance to events for a while and it might have changed since subscriptions went up for Whiskey Media, due to there being more money to go around."

Sure sounded like they're planning on going to PAX East, based on Ryan and Jeff's conversation on their drive home last Thursday. I'll re-listen to confirm if that was indeed the case.
 
...yep, starting about 9:30 in, the first reference is dropped, and it's confirmed again about 17 minutes in.

" Sure sounded like they're planning on going to PAX East, based on Ryan and Jeff's conversation on their drive home last Thursday. I'll re-listen to confirm if that was indeed the case.
 
...yep, starting about 9:30 in, the first reference is dropped, and it's confirmed again about 17 minutes in. "

" @PsEG said:

" Sure sounded like they're planning on going to PAX East, based on Ryan and Jeff's conversation on their drive home last Thursday. I'll re-listen to confirm if that was indeed the case.
 
...yep, starting about 9:30 in, the first reference is dropped, and it's confirmed again about 17 minutes in. "

Did they say anything about doing a panel? This'll be my first time attending PAX and it would be awesome to see one of their panels. "

" Did they say anything about doing a panel? This'll be my first time attending PAX and it would be awesome to see one of their panels. "

Well Jeff tweeted 3 hours ago "PAX East panel: Friday, 9:30PM. Please plan accordingly." Fun times are ahead

Damn, I wish PAX East was in ATL rather than bean-town.  Oh well I'll try to have to find a way to make it up there just to see these guys.

It's now officially official:
 
Giant Bombcast, Live! Feat. Da East Coast Family
Manticore Theatre
Friday, 9:30pm - 10:30pm

Yes, those lovable Vitamin-D deficient rascals from the Giant Bombcast are leaving the basement, crossing the country, avoiding specific law enforcement agencies, and making their unified East Coast debut at PAX East 2011! Each and every one of you is invited to touch the magic, feel the passion, explore the mystery, and taste the rainbow as fan favorites Vinny Caravella, Ryan Davis, Jeff Gerstmann, and Brad Shoemaker--plus some very special guests whose identities shall be revealed as soon as we figure out who they'll be, maybe--delight you with a magical evening that promises to be virtually defined by an overall lack of direction. Because that is how we like it. So don't screw this one up, for once! Come see the Giant Bombcast, Live at PAX East 2011! The Eastern Seaboard will never be the same!