> Where is the spec on this?

The only people who have ever seen it are me, WAHa, and perhaps Lain. I probably have one of the versions collecting dust somewhere on my drive.

BTW, if you're planning on modifying Wakaba, you might want to wait until the release of the next version. It has rudimentary support for a system somewhat similar to yours, so modifying it to run your semi-P2P system will be a lot easier.