Apple was awarded a new "software" patent last week. Patent 7,966,578 covers "Portable multifunction device, method, and graphical user interface for translating displayed content". It's a generic-sounding title, but the claims are a bit more specific, though may be hard to follow. There's a good visual description at YouTube showing a real estate web site on an iPhone.
Basically, this patent covers any software method of displaying web page content on a mobile device, where you scroll through the page with one finger, until you find a "frame" (embedded content, such as a map.) In that frame, you can use a different number of fingers to interact with the content (for example, "pinch zooming") just for that frame.
Tested.com also has their impression for what this means to competitors like Android.