I've just been dumping some of my thoughts into a wiki regarding the possible project to produce an Open Source ISP Billing system for use by small (likely Cable) ISPs. It's by no means a polished document, I basically just scribbled on a piece of paper for a few hours and then transcribed the ideas into the wiki.

I haven't transcribed the design/approach yet, though bits of it are sticking through in the way the requirements are described. Will leave that to another day.

I don't yet have the domain set up for the consulting business, so for now you'll have to go through the ssl server to see it. [Update: domain is set up now, link updated]