Time magazine, the magazine Jobs usually opens up the inside story of Apple developments to, says:
"Weaknesses? Absolutely. You can't download songs directly onto it from the iTunes store, you have to export them from a computer. And even though it's got WiFi and Bluetooth on it, you can't sync iPhone with a computer wirelessly. And there should be games on it. And you're required to use it as a phone—you can't use it without signing up for cellular service. Boo."