What the hell, I'll answer, too...

Established pro: I'd call. If on the off chance aces gets cracked, just write it off as a bad day at the office and head for the next major tourney.

Winner of a freeroll and first time at a major tourney, and maybe the only time in your life: maybe - MAYBE - lay them down. I wouldn't, but I'd understand if someone like that would. You were probably looking for more than a one-hand experience to tell your friends about. And it's not as if doubling up on the first hand is guaranteed to get you in the money.