I had a brief chat with Yoz Grahame after the Technology 2.0 event today, on the topic of Ning. Here's what's really cool. A few days ago, I wrote a piece called Ruminations on Message Boards, where I described how virtually nobody had done anything new or interesting with message boards and forum technology. Basically, the whole idea of message boards has been stuck virtually in a vacuum since 1996, with many, many recreations of the same, tired old ideas. 
During Yoz's talk, I found a discussion board system on Ning at discussion.ning.com. It offers much of the functionality which I want, and because it's 'cloneable' for anyone with a Ning account, anyone can launch a pretty, Web 2.0 message board which uses a tag-based folksonomy rather than an artificial hierarchy. 
I explained the point about letting organic organisation flow using tag-based hierarchy structures. There is something very Ning-like in the idea - basically, you are taking an aggregate of user ideas, and letting people 'clone' and customise them. 
Talk turned to OPML, Dave's OPML Editor and the suchlike. Yoz has actually installed Les Orchard's PHP server on to Ning. You can find it at opmlserver.ning.com. Neither Les Orchard's server, nor Yoz's Ning implementation support the blogging functionality, which needs to be ported over from the Frontier code. 
To be honest, when I first saw Ning, I said "meh". But looking at it again tonight, during Yoz's talk, is all rather exciting. 
), and there are 