Most of the tables have their eight seats open for late registrants. Players can buy in until the end of the fourth level. But some of the tables are much shorter than that. Michael Binger is currently playing at a table with three other opponents, and he says they were already playing three-handed when he arrived. Binger asked the floor if the other seats had been sold, but there was no answer readily available. The tables will likely fill in as the afternoon goes on. You can't expect too many high rollers to get up quite this early.