The old-fashioned way used by standards committees to organize conversations is a mailing list. A blog seems like a reasonable way to run a conversation too, p

The old-fashioned way used by standards committees to organize conversations is a mailing list. A blog seems like a reasonable way to run a conversation too, provided that there is a project organizer to highlight comments in new posts. Github is sometimes used this way, with the documents checked in and the conversation in the issue tracker, etc.