You can embed raw HTML in the LaTeX, so you can also embed movies and VRML models directly into the presentation.
make install prefix=/my/dir
init action:
textalk init
This makes a file called talk.tex in the current directory.
To LaTeX the file, type
textalk latex talk
To run xdvi at the appropriate size, use
textalk xdvi talk
To generate the HTML, run
textalk talk
Finally, the HTML to preview is in talk.textalk/index.html