OK, enough people asked, so...
Every good relationship starts by establishing some basic ground rules. Here's ours: you're on your own. Totally, bleakly, and emptily on your own. No support. No requests for enhancements. No cards on your birthday. And I want to continue to see other developers.
But I will consider patches. In particular splitting it up so it can be installed as a Gem would be really nice. You'd probably need some kind of generator to create a new slide show. I'd guess this would contain just a Rakefile, a slides/ directory and an html/ directory.