If you purchased your tickets online then you should have already received your bar code and you should be good to go. If you've won a fansite through a contest on this site or another site, those tickets are in a different pool. Don't worry, you'll get your tickets soon. Bashiok has confirmed that this list is still pending approval. Blizzard knows that you need your tickets in advance and I'm sure they're doing everything they can to get those tickets out.

Theres a separation between tickets for the general public and what we consider internal requests. The internal badge list is being approved and youll get your e-mail soon.

In the event that for some reason you don't receive a bar code, I'm sure you can pick up your pass with a photo ID just as last year as a backup.