Why should users upgrade their iPod? Summary: ZDNet's David Coursey talks with Apple's Greg Joswiak about whether iPod users should upgrade to the new 30GB iPod. April 30, 2003 -- 18:32 GMT (11:32 PDT) Loading... Please wait. Topic: Apple Kick off your day with ZDNet's daily email newsletter. It's the freshest tech news and opinion, served hot. Get it.