Many sites are good, but it is believed that folks should be able to go to one web location for all the meetings in the world for a particular organization. Outdated meeting information can be found all over the web. Attempting to go to a meeting that no longer exists can discourage a newcomer to the point of not trying again. Keeping accurate meeting information is an ongoing issue with twelve step organizations. To help achieve this goal, meeting information should be maintained in one location, or by one organization.
-From their web site