A better page of examples (user-contributed) is here: https://github.com/bartaz/impress.js/wiki/Examples-and-demos
You'll notice the user examples from that wiki are mostly the same basic idea... because it's quite difficult to make something more complex with impress out of the box. YOu can see a few pull requests that try to make this easier, like the one that supports subslides (i.e. a slide transition that doesn't cause a camera movement).
If you're going to use effects, make sure they actually contribute to or complement the content.
Really distracting and I wouldn't want to attend the presentation, like the comments above mention.
I really strongly suggest you find a use for it that is not presentation. When I'm presenting I want people to be listening to what I'm saying, or getting information of the slide (or from their handouts); I don't want them thinking "Hey, that's a nice transition, I can't do that in powerpoint, I wonder what they used; wait, did he just say 27% up or 27% late? Wow, what was that group for?" etc.
I liked the way it told me after a few seconds that I needed to use arrows or the space bar. And it kept the back-button functionality.
All the references to Yoda made me dig up this classic. http://www.youtube.com/watch?v=493ljyoox6o
Pt1: http://www.youtube.com/watch?v=AFA-rOls8YA Pt2: http://www.youtube.com/watch?v=CeLrlmV9A-s
(The rest of the series is quite fun as well -- and impressive for an indie outfit)
I will get round to doing a mind map in this. A 'run time' steerable navigation mode would be great (I tend to do 'random walks' while teaching, and I use slide sorter view a lot during lessons).
https://github.com/aestasit/slidery
(the guy who created it is my business partner)
Not surprisingly I like mine better, since you (in theory) shouldn't need to write any code, just create a markdown file a correctly formatted file.
Warning, there is a lot of zooming around and you might feel sick.
should still work in chrome/safari.
Although I'd stress not too use too many effects.
I read this recently...
http://www.guardian.co.uk/uk/interactive/2012/dec/28/2012-in...
and it's just way too disorienting.
Stay subtle :)