Share 'Nobody concerned about creating all this content at Ning.com?'

I first ran across Ning last summer, and was figuring something like this group would come along, and I'm glad to see it give me an excuse to play with Ning. However, jumping ahead 18 months, who owns the thing? Also, the URL's to the blogs here like this - http://socialauthority.ning.com/profiles/blog/show?id=xxxxxxxx etc. Are those even spidered? Can they rank and pass juice? it would might m…