Pepsi Sent me a care package including cans which included logos which went all the way back to their first one. Of course we all know that a brand isn't a logo—but logos are extensions of a brand. Symbols of what they are. That said, I think Pepsi should change their logo consistently. If Coke feels "classic" then Pepsi should be classically un-classic. The opposite of Coke. If Coke is Sinatra then Pepsi is Madonna—It consistently stays in a constant state of reinvention.
Anyway, my 2 cents. What do you think?