9. The method of claim 1 , wherein a request to insert the response of the responding user specifies an intermediate location of the one of the comments.
9. The method of claim 1 , wherein a request to insert the response of the responding user specifies an intermediate location of the one of the comments. 10. The method of claim 9 , 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.