I'd really like to know this too. I am hoping to download all the pictures for a coming reunion, but the REST API is gone, the "Export Content" tutorial is blank, and dav doesn't give me access to content, only code.
I also really need a way to back up or export all my content, I am a little paranoid now that my network is growing that everything will go up into smoke if Ning kicks the bucket
I'd also like to know this, I freelance setting up networks for organizations, one of the first questions I get asked is about backing up and exporting content. Many potential clients are put off when I have to answer that at the moment there is no way to do it.
I too would really want to know if such a service can be made available. I am doing some research and would need to benchmark the network. THere is sure a better way to do it than present...
I have the same need to export the whole NING site and now I'm really upset with them as they stopped all related API, WEBDAV, FTP and any information on how to get back my data.
I'm not a lawyer but I think we are in the position to start some legal action.
We can keep in touch between us using some facebook group. Is there any tech savvy that can prepare it ?