I'll note there've been all of three new users as many months. I was thinking the other day, while reading twitter, that the relationships between people in the tech world are something I'd be interested in tracing. Sixmore was meant to help me figure out peoples personal connections, but didn't really reveal anything I didn't know. Retasking it to something more focused might be interesting. And, I think you'd get a better quality of user (I'm not even going to try to count how many people are flagged with "bad name" or who have an account with /no/ connections in or out) if you can only join once someone has already linked to you. Drop some of the sillier or less useful relationship types and add in more detailed types.. I'm not sure what those would be offhand, but things related to open source projects and working with public service organizations and barcamps and hardware hacking and.. I dunno. Things.
Or you know, just turn it off.