Excellent discussion on alternative funding models for social enterprises going on over at the Skoll Foundation's Social Edge Website.    Moderated by social finance expert Jessica Margolin,  lots of alternatives and examples are discussed.  Also, the posts are coming in from around the world (most seem to be from outside the US) and the global perspectives and differences are quite interesting. 

A large and excellent set of links on social enterprise funding methods are included in the thread.  For those who want the Cliffs Notes version (I guess these days I should be using Spark Notes), there is a good summary on Jessica's blog.