Case studies for loyalty management (insight extraction)

Hi all,

I have just been called for an interview with a loyalty management company. I have been told that my data mining skills will be assessed using case studies.

Given that this will be my first job if I succeed and so I am not entirely familiar with all the problems affecting real world data sets, I thought it would be a fair question to ask here if any insight analysts or customer analysts would know about some case studies that I could practice prior to my interview.

I would like to test my data analysis skills on these case studies, or even really just to get to think about the problems faced in the real world data sets. So could users here recommend some links/books for such exercises?

I will be obliged.