19. The method of claim 11 , wherein the request to insert a response to one of the comments from the responding user specifies an intermediate location of the one of the comments.
19. The method of claim 11 , wherein the request to insert a response to one of the comments from the responding user specifies an intermediate location of the one of the comments. 20. The method of claim 19 , further comprising: sending for display to one or more of the plurality of users the plurality of comments received for the conversation in a tree-branch configuration, the comment from the responding user starting a new branch from the specified intermediate location.