A person who continuously checks their iPhone for facts which he/she uses to school people with.
OR
Someone who cannot be parted from their iPhone at anytime due to serious infatuation with the device.
iPhonite: "I wonder why there is a 57 on the side of this ketchup bottle."
iPhonite: *whips out iPhone* "Well according to this the 57 on Heinz ketchup bottles represents the number of varieties of pickles the company once had!"