More questions re: Presenter pattern & ActionView

We've been playing with the Presenter pattern a bit (as I asked about
a few weeks ago) and now better understand the limitations without
hacking deep into Rails.

We're sticking closely with Jay Fields' thoughts:
http://blog.jayfields.com/2007/03/rails-presenter-pattern.html

But since a Presenter isn't an ActionView, we wind up with ERb that
looks like this (from our Atom feed generator):

<%= @presenter.make_tag_URI(url_for(@presenter.entry)) %>

instead of something nicer like this:

<%= @presenter.entry_id %>

So what we want is to call ActionView helpers inside our Presenter
methods. Thoughts on how to do this? Should we be making our
Presenters subclasses of ActionView? Is there some other "down in the
guts" way we should pursue?

We've looked at Simply Presentable and it seems to have the same
issue.

thx,
--dwf