This wiki is for maintaining the official Gnutella2 specification and as such requires special rules on how changes will be accepted in to the specification. The Talk pages and the mailing list will be the two primary ways of discussing changes. There is no definitive list of people who have to approve or a voting procedure for changes to the specification. For now it is an informal process which should be arrived at naturally and diplomatically. Changes that aren't backward compatible should be avoided at all costs. It is very unlikely that anyone will agree to such changes anyway.
The packets pages can be handled slightly differently. Extensions to them that a vendor has made and is using in the wild can be added to the respective packet page in the wiki. These extensions should be clearly marked with which vendors support them so that other developers will know whether they are required and who to expect them from.