Article length slider in Safari RSS support

More than 10 years ago, during an InfoWorld interview I conducted with Ray Lane of Oracle, he predicted a slider bar control that would allow readers to get different length summaries of news articles. It sounded like science fiction to me. Now Apple has apparently done exactly that, using its Safari Web browser and RSS. Truly, savvy audiences are gaining the upper hand with media. (P.S. If Apple tries to patent this concept, maybe Oracle has some prior art?)