Loved the group interview podcast! We used to call people back for 2nd or 3rd interviews, but now my boss likes group interviews. I often feel really bad for the interviewee -- there are sometimes up to eight people in the room! I hate participating in them.
Your advice, of course, was spot on. I can look back at interviews we've given, and can honestly say that making eye contact to everyone is very important. You just never know who the most influential person in the room is, and if you ignore them, that could be fatal.
The name issue is a touchy one with me. I have a name that lends itself to a common nickname. Eight out of ten times, people that I meet hear me say my name, then immediately use the nickname. When it's an interviewee, I will take points off before they even know what hit them. The message that I hear it, "I really don't care who you are."