I think the idea of an HTML/XHTML and CSS-driven presentation system makes a helluvalot of sense in fact, and I'm surprised it doesn't exist yet. So, wait, *does it*? Anyone?
Well, maybe not as a presentation package per se.
But you could easily press the Adobe Creative Suite
or Microsoft Expression Studio
offerings into service to create presentations. And there's a lot more you can use if you want to mix and match products from other sources. Especially if you don't insist on working in a WYSIWYG or all-in-one environment. Many excellent tools are even free.
Look at it this way - a slide show, a book, or a web site are all basically the same thing - a collection of dimensioned areas containing text and graphics designed to be presented in some sort of ordered sequence.
Websites have the 'advantage' of being less linear
in fundamental structure (hence the hyper
reference in HTML). But that is more of a feature
than a requirement
since many websites (blogs, shopping carts, reference works, forums, magazine sites, webcomics, etc. ) tend towards linear presentation
in actual use.
So what's the main difference? Page size - and colors supported.
With print, you can go as high and as colorful as your budget can afford. For web-based technologies, there are some technical limits that are well documented in any web design book you'd care to look at. But basically, anything you design on screen should look good when projected (@1280x1024) so long as you use something like a 1200 wide page with 20 or 24-pt type. Again, it's hard to be specific for all cases so you'll need to do a little experimenting to see what looks best for what you're working with.
Once you've got that worked out, it's a simple matter to create style sheets and a 'design manual' for future work - or rework
in your case!