What:
Groundswell from Harvard Business School Press, written by Charlene Li and Josh Bernoff.
Summary:
This book does a good job of explaining “web 2.0″ and social media technologies, what the implications are for your organisation, and how to take advantage of them.
Who should read it
Business owners/CEOs, marketing people, communications people, entrepeneurs, and anyone who is interested in [...]

Here is a mention in Banking Technology magazine about BNP Paribas’ use of blueKiwi
It’s a loooong article but I’ve extracted the important bit
http://www.bankingtech.com/bankingtech/article.do?articleid=20000128562

“Social software tools for banking are also starting to appear, and banks are starting to employ them. BNP Paribas, for example, realised that its individual divisions often had information useful to [...]

Something that organisations often overlook is the by-product of people’s interactions with each other.  As people interact in a transparent way, this naturally leaves a wealth of knowledge that is reusable by the organisation. They key is being able to access this knowledge. This is my number 1 argument against using consumer tools such as [...]