Open source management consultancy

Slightly off-topic, but as our overriding focus is on disruption, and we have discussed a number of industries outside telecom from time to time, this one's for you, McKinsey. A group of smart people who have an unabashed affection for UK supermarket chain J. Sainsbury have set up a group blog to identify strategic flaws and solutions to help the company dig itself out of the hole it's in. Marketing and customer service heads have certainly been given plenty to chew on over the years from the likes of the Digital Spy forums, but this is the first case I've seen in Europe of a company-specific blog which is actively trying to engage management in how to run the business better.