You'd need to setup the Trigger.io build / test environment to see the full example code from the post used in a mobile app. Maybe next time we can show that to you in a screencast, we'll work on it.
Is using/experimenting with Trigger.io as trivial as an apt-get or npm install?
Not a screencast as I can't gauge lag from that, but a functioning demo to play with.
I want to be able to test on my phone to see it's "simple and fast" from the UX perspective before I'll investigate further.
"Zepto exclusively uses CSS transitions for effects and animation. jQuery easings are not supported."
The sort of thing you've described seems to have been implemented pretty well as a zepto plugin: http://blog.kojo.com.au/flickable-zepto-plugin/ (in particular this demo: http://blog.kojo.com.au/demos/flickable/demo2.html ) which works wonderfully on my Galaxy Nexus, but I haven't had much of a chance to play with this yet!
Android has a whole bunch of velocity trackers, but they're probably expensive in JS (solve least squares, etc). Code is here: https://github.com/android/platform_frameworks_base/blob/mas...
We can't accelerate animation on a mobile app that uses position:fixed for persistent headers due to http://code.google.com/p/chromium/issues/detail?id=20574
This makes for some jerky transitions, unfortunately, but the alternative is forgoing the simplicity and performance afforded by position:fixed for persistent nav.
:-D
