Will TicketMaster release more tickets?

I'm trying to buy NE Patriots vs. Falcons at Gillette. They had just went on sale at 10 am this morning. Considering its 3:30 now, is it possible that they're all sold out? Besides standing room tickets, no tickets are on sale, NOT ONE TICKET. So, I'm just wondering what to do from here. All the other sites are too expensive.