>It's trademark... No you can't go on individual features, like being rectangular, or a grid of icons, or thin, but once you put that all together in a certain way, you start getting into design trademarks.

If it is the trademarks, it's really no surprise that Apple is suing. In order to keep a trademark, you have to maintain it. So Apple probably had to sue to keep their iphone trademarks.

Google has the same issue with the use of the word "Google" as a verb.