Regarding 1 on 1 interviews.
The process may have changed, or differ from store to store, but basically you've more-or-less got the job once you've passed the magic stage. The interview is just a formality.
You just got to bring right to work docs, dress well, etc. You sign a few things, fee simple questions and hey presto.
That said, it may have changed or differ store to store, or even managers.
I found out only the other day, my old manager (I'm on another department now) was fairly new to his job, so it's quite possible the seasonal interviews he did in Xmas 2010 were his first, hence the quick interview (5mins- if that).
Just incase it has changed, it won't hurt to come armed and ready for a proper interview.
Just be ready to answer questions about yourself, have some background reading into the company, and ask a couple of questions yourself (when prompted).
Good luck and hope it goes well.