My favorite way to do simple presentations with "LaTex" is to set paper
size to something very small in LyX (http://www.lyx.org/) and then create
the presentation with it (using Xdvi to preview it). Then when I want to
present it, I export it as PDF (or PS) and show it with Acroread (or Xpdf)
in fullscreen mode.
Miniscule page size, scaled to fullscreen -> presto, presentation with
suitable sized fonts. No need for any special presentation style. :-)
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