Thanks to Wulf for his comments. Stuart's blog can be found at http://www.thewordatthebarricades.typepad.com/ and is well worth checking out.
As to how we're organising our Sunday gathering, the aim is to have lunch and have people talking as they eat in small-ish groups. There'll be some feedback there and then with groups invited to tell everyone else where their conversation's going. We'll also be inviting groups to make notes, draw pictures, etc which we'll gather up at the end so we can produce a record of the conversations to provide stimulus for further conversations.
There will also be a more formal section of the meeting as there are items of business that have to be done - though we're hoping these will be done in the same convivial spirit as the round table chat.
As with all experiments, we're not sure what'll happen. But i'm very excited at the prospect of doing something new that is potentially much more inclusive.