MIT's article on how to prepare for interview - http://mitsloan.mit.edu/mba/admissions/MITSloan_interview_guide.pdf
Whartons write up on what is behavioural interview- http://forums.businessweek.com/bw-bschools/messages?msg=49845.4
I posted a collection of interview questions from last year + my collection based on emails etc. ( http://forums.businessweek.com/bw-bschools/messages?msg=46245.321 )).
University of Melbourne on Behavioural interviews : http://www.services.unimelb.edu.au/careers/pdf/employment/behav.pdf
Last years MIT Sloan threads
R1 : http://forums.businessweek.com/bw-bschools/messages/?msg=34788.1
R2 : http://forums.businessweek.com/bw-bschools/messages?msg=39727.1
Most importantly Lot of prayer, good wishes . Besides you should eat , drink and sleep Sloan :)