The recently published Jetpack 2.0 plugin for WordPress unfortunately deleted the text I had posted along with this email (Jetpack’s Post by Email), but what I meant to say is that all it takes for a site to provide an apple touch icon for iOS home screens is a 128x128px icon. Mine is called apple-touch-icon-precomposed.png, where the precomposed indicates to iOS that no further editing of the icon is required from Apple’s side (i.e. shiny layer), except for the round edges. I wish more sites on the web would integrate this into their setup.