I wonder if I can use slidy with mediawiki.

with a cgi-sort-of-thing?

all <h*> into h1, so the slide set is easier to navigate? And yet, slides aren't supposed to be easy to navigate.  :-)

Slide 1

text of slide 1

Slide 2

test of slide 2

H2 after Slide 2

and H3

Slide 3 or maybe 5

body of slide 3 or maybe 5