Daniel Goldin wrote:
>Anybody know of a way to link to a sup-mail email?

Integration with sup is not (yet?) supported by Org mode.  What you
basically need is (a) a way to create a link from within sup and (b) a
way to remotely open a message in sup.

Maybe this tutorial about integrating Org mode and Mutt can be
a starting point:

Stefano Zacchiroli
remember Mutt's mail in Org-mode and jump back to them
http://upsilon.cc/~zack/blog/posts/2010/02/integrating_Mutt_with_Org-mode/

HTH
  -- David

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