This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
Do we need to keep track of what seats a user booked? I am just deleting them from the db if all goes well (locks are cool and the seats are there). So my answer would be no, but I would like to hear what others have done.