Tomorrow hopefully my Apple store will have it in stock. Once I get it i'm leaving for vacation. Can I use it straight out of the Apple store? Or do I have to sync it in iTunes to get all the features. If so do I need an internet connection?
You will be able to use the phone right as you leave the store, but of course it will not have any music, movies, or applications on it. For those, you will either have to sync some in from iTunes or buy them from the iTunes/App stores using those apps on the iPhone from a location in which you can use WiFi. iTunes will require an Internet connection.