Lion borrows another element of the iOS’ soft keyboard

If you don’t remember the shortcuts to type à or è, or you simply don’t want to use the dedicated keys on your Keyboard, Lion offers a way to get accented letters using standard keys.

When you’re typing, keep a key pressed for a few seconds (say, the “a” key) and  an iOS-like menu, will pop up, to choose between variations of the same letters with different accents.
iOS 5 accents
By Hugo Costa