If you have any particular questions - I'll be happy to answer them.
Otherwise I highly recommend you to check the 2012 thread for posts of current year MBA candidates - based on my experiences with 2 assessment days I can only confirm their words and express all the gratitude to them for doing great job of putting into the text their experiences.
Wish you good luck with your IMD MBA journey!
PS I've noticed you tried to collect statistics regarding the nationalities of the people accepted in round 1 - for 03/04 assessment day two accepted are Chinese and Ukrainian (from what I know both of us accepted the offer), five waitlisted are two French, two Chinese and one Indian. Hope this information is useful for you.