Hi I notice some possible interesting Ning sites community dedicated to energy and building researchers network as universities spinoff in europe.
1)energy.ning.com (energy community network)
2)loghomeclub.ning.com (community Ning of the American review of "Log & Timber Home Living of wooden houses)
3)facades.ning.com (European universities network dedicate to projects aped to buildings and architecture )
4)ixdasf.ning.com (User experience design community Ning site in S. Francisco)
4)sfspanish.ning.com (spanish california linguistic community with courses)