Hi Sugar,
I'm pretty sure that the 15th is the first round of interviews (you will be among SDN friends though - look for JohnDean). I've heard that the panel format is actually better because you don't get grilled as much (all of the pressure is dispersed among candidates). Check out interviewfeedback.com. And be sure to let us know how it goes, Gator and I will be there on the 22nd. Best of luck! 😀