Nice plugin, but dear lord the readability on this site is atrocious. Leave the ultra-light font weight for the headers (even that might be too unreadable). Body should be at least 300. http://www.google.com/fonts/specimen/Lato
http://fiddlesalad.com/ < Supports HAML, SASS, Coffee and many others. Not as clean as jsfiddle, but makes up for it with its features. Oh and there's documentation too.
Here's a quick and dirty screencast http://screenr.com/QrB8
Basically, parts of the UI that would be hidden when the window is off-screen, get moved inwards.
I believe Marco, in his podcast, said that he is already bogged down working on Instapaper on the already supported platforms. http://5by5.tv/buildanalyze/67
This is especially true since the iPhone 7, with its two low power cores who's entire purpose is to extend battery life.