Welcome to the Bungie fan community, otherwise known as B.net. You may want to take a few minutes to check out the stickied topics in the various foruns, especially the "how do I" and FAQ varieties. To answer your question though; To start a group, you would go to the 7th Column [url=http://www.bungie.net/7thColumn/][color=white]here.[/color][/url] To find a pre-existing or to advertise your newly created group, you would do that in The Classifieds, located [url=http://www.bungie.net/Forums/topics.aspx?forumID=9][color=white]here.[/color][/url] If you have founded a 7th Column group and have questions/comments about the groups, or want to discuss the Bungie fan community, you can do that in The Septagon [url=http://www.bungie.net/Forums/topics.aspx?forumID=3][color=white]here.[/color][/url] To discuss Halo 2 in general, you would go to New Mombasa [url=http://www.bungie.net/Forums/topics.aspx?forumID=6][color=white]here.[/color][/url] Once you've created and/or joined a group, you could also have tons of discussions (with members of that group) on the group's own internal forums.