iOS - Lower corner radius changes when keyboard pops up.
iOS - When merging icons, the drawer created gets the name of the appropriate category or genre of the apps therein.
/via Lucy Marx
Instapaper - When copying a link and opening Instapaper on iPhone it asks if you’d like to add it.
Batch - When enabling the camera flash, the camera icon on the shutter button gets a little white flash.
Weather app - Swiping down in iOS 5’s weather app reveals hourly forecasts.
Newsstand - The cover of each publication updates automatically in both the icon and the popup.
iPhone - The Siri button gets the same functionality as the space button while typing quickly.
/via Peter Robinet
Google maps - The iPhone icon represents the actual location of the Apple headquarters in Infinite Loop Cupertino.
/via Jan Semler
Square card case iPhone app - Credit card form that shows card type and flips around when you get to the security code on the back.
via Matt Bilson
iOS - When using internet on EDGE network, loading icon in status bar rotates slower than it does on 3G.