When it first arrived in iPhone apps, the simple “pull to refresh” action was instantly hailed as a genius bit of user interaction engineering.
It’s an ultra-intuitive way of refreshing the displayed page content by simply pulling the page down with your thumb, then releasing it — sort of like pulling a lever on a slot machine. The official Foursquare and Twitter (nee Tweetie) apps use it, so if you’re into social networking, you’re already familiar. But so far, its use has been limited to native apps.
[Hat tip to Dion]