Awesome! This is actually quite useful. I wish this could have happened earlier, but in any case, this makes it easier for groups to actively post more frequently (I tried using Google groups and Ning with group projects, but boy people are lazy).
Sounds nice and dandy, but does it keep the URL architecture in place? If I want to move my blog to a new location, I would want to keep all the base URLs in place: for posts, archives (category and date), for tags, etc etc. Otherwise I loose search engine traffic and inter-connectivity between posts.<p>Can they do it?
I'm guessing their scraping the sites content. From a quick Google search it seems that only very recently has their been an easy way to export your data from Ning? Pretty bad form for a network that has been around so long if that is the case.
I asked this on the TC comments, but do you have to own the Ning blog you want to copy to Posterous?<p>If not, and I can take anyone's Ning content and use it as my own, that's a big problem.