Agree that HTML isn't ideal for writing content. Support for Markdown was added to reveal.js two days ago and I'm hoping that will make it a bit easier. A GUI editor is also underway for people that don't want to touch any code at all.
This looks great! Is this available somewhere to play with? If it supports vertical align in addition to the features you demoed there, that's all I need for most of my presentations.
Hallo.js looks cool. I like the idea of inline editing. That said, I've already spent a good amount of time fixing integration errors with my current editor so am not sure I want to restart that process with another library right now. Perhaps after release.
Sure is frustrating that you can't get an update ('scroll') event from -webkit-overflow-scrolling: touch, so I left the scroll effects with regular overflow scroll.
There's a 3D rotation transition between slides and on the anchors – requires Chrome/Safari/Mobile Safari/FF10 though so perhaps you're not seeing them.
I added an option for rendering on a canvas element instead of adding elements to the DOM. It performs a lot better this way since there's no DOM reflow/layout to worry about.