iOS - If you tap the camera icon in the lock screen of iOS 5.1, it bounces up to encourage you to slide.
iOS Notification Center - When swiping on a notification, it tells you exactly where you’re going in the application.
/via Joshua Kehn
iOS - Lower corner radius changes when keyboard pops up.
iPad Keyboard - There are phantom keys in the middle when you split the keyboard in half.
/via Reinier Ladan
Facebook iPad app - When tapping a tab that is already open, the content wiggles when the sidebar disappears.
/via Thomas Bogner
iOS 5 - When the phone is locked, you can “slide to view” the notifications themselves, taking you directly to the app.
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.