I think that the Big Society will continue Labour's trend of pulling third sector orgainisations into service delivery under contract as a way of making the commercialisation of service delivery look less cynical and less blind to community interest. And the Big Society rhetoric muddies the water not even Tories know what it means so that all sorts of commercial activity will blend in with 'community initiatives' and all sorts of entities that have commercial interests will be able to represent themselves as being 'of the community'
When commercial organisations get involved with public service projects they have one of three motives -- straightforward commercial ones embodied in payment for services delivered under contract; a PR objective of promoting their organisation via some pro bono activity; and genuine philanthropic interests.
The proper regulation of the third sector, partly by the legal structure entailed in the status of charity or social enterprise, and at the very least by an established code such as the Compact is necessary to avoid a complete elision of commercial and communitarian motive.
It is especially problematic in the case of online 'communities' like MN, where the term 'Mumsnet' doesn't distinuish between a community of posters on the one hand and a commercial organisation on the other.
MN is fortunate to have a well-intentioned set of owners, but these sorts of developments are worrying when you think of the precedent they set for this sort of Big Society equivocation.