It's 2013 and there are tons of programs that can generate a decent HTML based presentation from a text file. Heck, I've encountered one just today while looking at the slides for "fedmsg - The Fedora Infrastructure Message Bus" [1]; the tool is named hovercraft [2]. Another nice tool is landslide [3].
I've been using dzslides (https://github.com/paulrouget/dzslides) and been pretty happy. I wrote my own tool to take markdown and emit dzslides and I've not been upset yet, but my slides tend to be very minimalistic.