THE PORTABLE MUSIC PLAYER MARKET TAKES ANOTHER ODD TURN: The VIC-20 is reborn as an MP3 device - or, rather, Commodore enters the player market with a twenty gig machine named after its old entry-level home computer. The PET name is being revived, too, for some other players. It's all very curious. (In case you're curious, yes: there will be a commodore 64 as well, a joystick you plug into your TV with c64 games built into it.) Two questions: Why? and why?