This paper presents aspects of a study into how and why people use camera phones. The study examined people's intentions at the time of image capture and subsequent patterns of use. Motivated by current interest in "picture messaging", we focus on images taken to communicate with absent people and look at how they were actually used. We consider the timeliness of communication and the role of common ground to derive implications for design. Author Keywords Camera phones, multimedia messaging, mobile phones. ACM Classification Keywords H5.m. Information interfaces and presentation (e.g., HCI): Miscellaneous.