Never having owned an IPad, what power cord comes with it? A USB or 120v cord? If it's a USB only cord would most people recommend buying a 120v cord also? How else would you charge it while traveling?
Yes you can but the iPad comes with a special 10W Power Adapter, the iPhone only comes with a 5W adapter, so charging your iPad with an iPhone charger will take twice as long (unless you charge it over night, then their is no difference).