I just interviewed at UAB and can pass on some of the info that I learned while there...
They only interview about 8 people at a time, once a week, almost every week (excluding Holidays, weeks with meetings etc), they break the interview groups into Out of State and In State. Mine was Out of state 4 males and 4 females...
We were told only about 1/4 of students receive supplemental apps, 1/2 of those are interviewed and 1/2 of those are accepted, as far as the break down of IS and OS, I don't know.. just what I saw on Doc Toothache's spreadsheet...
As far as the school and interview.. everything was laid back, very welcoming and questions were straight forward!