I wonder if it will be possible to syndicate whole forms through RSS or Atom feeds, in which a whole form (i.e., an input form for your name, date and comment with a submit button) can be syndicated as a web feed.

That will be especially useful for posted comment feeds from whole blogs or single posts, such as this, only with a built-in reply form that you could use from within the feedreader rather than having to view the post’s original URL before commenting.

To be closer to home, this would be a web feed equivalent of the LiveJournal feature where you can reply to subscribed comments via an email form.