I saw the Dharma Initiative Booth, but it looked somewhat disappointing. You had to sign up for an appointment with them where you went into a sealed booth and listened to something on headphones. I couldn't figure out what it was, or if it was worth it, so I passed it up. :S

And even if I had wanted to go to the Lost panel, I didn't line up early enough. Hall H was CRAZY this year. I'm sure that all possible spoilers will be filtered into various fan groups quickly enough, though.

EDIT for grammar. I'm so exhausted right now! x_x