I'm sure there's an answer to this somewhere on this board, but I honestly didn't look to hard.
Once the white iPhone is released, I intend to get one which will leave my 3GS in iTouch mode. I was going to sell it but thought that I might keep it and use it in my classroom. My question is pretty simple: can I sync my new iPhone 4 and my old 3GS to the same iTunes account and have access to both my songs and my apps? I am assuming that I'll still have WiFi connectivity after I no longer have AT&T service.