in reply to
I know this may not help you too much, but I thought it
interesting, particularly since I just saw it last night.
Tom Christiansen has a set of Perl tools that he uses for
slide presentations instead of PowerPoint. The kit is
called PerlPoint. I've never used it or even played around
with it, but I thought it was worth pointing out/suggesting
that you give it a look.
So take a look at PerlPoint, if you want.
Of course, this doesn't help you if you're not the person
saying, "use PowerPoint." :)