On this page, I’ve been fairly skeptical about social software. My experience has been this–the more specific the focus, the more useful the application. So, I like LinkedIn–used for business connections–more than Friendster, Orkut and the like. Through an Irish colleague, I learned about Clever Cactus, social software for creating private file-sharing networks.
This prospect appeals to me. I have friends whose musical tastes I admire, for example, so I’d be keen to see what they had on their machine. I’ve got 5266 songs on mine, and sundry other fascinating files, and would be happy to share the bounty with my friends and colleagues. I can’t imagine that they’ve built this system with, you know, copyright infringement in mind, but what the heck? It’s only among friends, right?
Clever Cactus has adopted the Orkut invite-only model of populating their online community. Until I actually assemble some people with some content, it ain’t much use. If you’re interested in signing up, and particularly if you’ve got, you know, files to share (wanna buy a watch?), drop me an email or post a comment.
Incidentally, Clever Cactus’s CTO has a weblog.
DarrenBarefoot.com 
Ah-ha! Absolutely, get me in! I’ve been writing about it for a while, and even sent an email out promising to share invites with a bunch of people I figured would be likely to be in the first wave.
Don’t think of this as social software — it’s great use (from what I’ve read) is going to be around easily sharing/collaborating on documents. And, it turns out there is something we need to work on :p
(BTW — your RSS feed strips links, so if we re-post stuff on e.g. UrbanVan, none of the links get carried along)