looking in to getting an i-pad 32G+WIFI and i have a couple of questions before i head to the store: 1) i know there is no usb plug in so i would not be able to pull music and movies off of an external hard drive. only through i-tunes right? 2) i know there are a lot of apps for i-pad. are there places to get free apps? 3) if i have a 120G i-pod not all of my music will fit on my i-pad right? still new to this stuff so be gentle and thanks in advance!