Use Magpie to receive post and comment content together

Can I use Magpie to subscribe the post content + comment(s) content for a weblog’s entries to a single target page?

Then, I can use Dada Mail to distribute this to a mailing list after Dada automagically grabs the webpage. Dada wants to grab the same URL each time it checks per regular schedule.

Alternatively, can I take two URLs like this:

http://mysite.com/index.php/site/comments/some_post/

http://mysite.com/index.php/site/comments/some_other_post/

And rewrite them so they (and similar entries) now publish the same URL below, instead of their original URL:

http://mysite.com/index.php/site/post_with_most_recent_submitted_comment/

I don’t need to generate multiple entries; the single post containing the newest comment will replace the single last displayed post-comments entry on the output webpage.

This is solely to enable Dada processing. Human readers won’t see this url/page.