22. The method of claim 19 , wherein: the markup document corresponds to a weblog page; the first portion of content includes information relating to a previous version of the weblog page content that had been previously displayed to the user; the second portion of content includes information relating to a current version of the weblog page content; and a third portion of content includes information relating to new or modified weblog page content which was not previously displayed to the user.
22. The method of claim 19 , wherein: the markup document corresponds to a weblog page; the first portion of content includes information relating to a previous version of the weblog page content that had been previously displayed to the user; the second portion of content includes information relating to a current version of the weblog page content; and a third portion of content includes information relating to new or modified weblog page content which was not previously displayed to the user. 23. The method of claim 22 , further comprising initially displaying the third portion of content to the user in response to the action.