We are working on a example NLP exercise for retail sector. We need unstructured customer/client interaction data (such as  call logs with transcriptions). It doesn't have to be retail or corporate data, government or public would be useful as well.
The DECODA RATP Corpus would be perfect, but has a lot access and reuse rights issues
http://lrec.elra.info/proceedings/lrec2012/pdf/684_Paper.pdf