Logos are a different kind of design. They're tricky. They have to encompass an entire company, brand and attitude in one image. Sometimes that image is iconic – the NBC peacock, the Verizon red checkmark, the Mercedes-Benz pointed star. Other times it's, well. . .not. Even iconic brands can get it wrong – especially when they trade in a tried-and-true logo for something "new and fresh." Yahoo is hoping to get it right with its new logo, which...