Do you have a free Ning network and not want to upgrade it to a premium site? Then SaveMyNing might be of interest to you. This is what they say about their service
"Save My Ning is an archive service that will allow you to backup your existing Ning Network on our webservers for free. We will host ads on the sites in order to cover the cost much like your Ning Network had ads. However, you will not be able to post to your archive, only read it."
