I've seen people bitch on other message boards (maybe 1 or 2 here....) when someone calls it an iTouch, as in "It's an iPod Touch, not an iTouch n00b!" So I just go iPhone/Touch, or just iPhone. Kind of like how you're supposed to just say "he" or "she" (singular) when writing, when most of us just go ahead and say "they/them".
