The interview lasted 3 hours in 45 minute shifts with pairs of interviewers and one stint with the hiring manager. I got home about 4:25pm. At 4:20pm the hiring manager left a message on my answering machine requesting 3 references that she could call over the weekend. So I think I'm in good shape. I've never been through a more intense interview process or been more nervous about a job.
Thanks for your continued support and concern.