Fair enough. Like you said elsewhere on this thread, we're down to defining "off the shelf" now, so I think we should probably call it a day.

  http://code.google.com/p/mochiweb/issues/detail?id=2
  http://www.google.com/search?q=comet+site:http://yaws.hyber.org/
  http://frihjul.net/iserve

Those are the available docs for the technologies you mentioned. Yaws has some real documentation, but not for its Comet implementation. The others give you some source code and tell you to have fun.

So yeah, it's right there on the shelf (how 'bout we settle on "perched on the edge of the shelf?") I'm just not smart enough (or motivated enough) to actually use any of it.