Personalisation reports/case studies

Bit left of field query but hopefully someone out there can point me in the right direction.

I am doing some research and looking for good case studies/reports for online personalisation. I've seen plenty of 'how to' & 'why' documentation but this isn't the area I'm after.

One of the better ones I have seen is from Researchscape International. If anyone out there has some good resources, that would be great.

Cheers in advance