Here is an interesting essay from Nonprofit Online News: The Permeable Nonprofit
People Support Causes, Not Tax-Exempt Corporations
Organizations could respond to this assault on their boundaries with policies of control, as many did with email and are trying to do with blogging, were it not for some critical facts: The people who are in these new networks are their people. The issues being taken up by these networks are their issues. The passion that is driving these networks is the passion they were counting on.
This fits well with some of the ideas I discussed in my Association 2.0 article.
(Via World Changing.)