You might have heard by new that Time named the Apple iPhone the "Invention of the Year." I'm not going to dissect the magazine's reasons for choosing the iPhone--News.com's Tom Krazit already did that--rather, I'm more confused as to whether the iPhone should even count as an invention. As some CNET readers have contended, Apple didn't invent the cell phone, it just built its own version. And even if everyone agrees that Apple improved on the concept, should that count as an invention? What do you think?