Today Google announced that it is closing Orkut, its social network that has been around for 10 years.
If your Ning site has members from Brazil and India where Orkut was huge, you may see an increase in new members as people look for another place to make their online home. I've already heard of this happening. It may be a good time to promote your site, as people leave Orkut and look for another place to go.
It will be interesting to see how this affects Ning, if at all.
“Change is the only constant in life.” - Heraclitus
Best wishes to all!