Emerging technologies such as location-awareness devices have the potential to significantly impact users' social coordination, particularly while rendezvousing. It is important that we explore how new technologies influence social behaviours and communication in order to realize their full potential. This paper presents a field study investigating the use of mobile location-aware devices for rendezvous activities. Participants took part in one of three mobile device conditions (a mobile phone, a location-aware handheld, or both a mobile phone and a location-aware handheld) and completed three rendezvousing scenarios. The results reveal key differences in communication patterns between the mediums, as well as the potential strengths and limitations of location-aware devices for social coordination. The paper concludes with a discussion of relevant design issues drawn from observations gathered during the field study. q Mobile devices today come with many features and gadgets such as digital cameras, text messaging, email, web browsers, games, and personal organization tools, just to name a few. As new features continue to be introduced, some will become core components, while others will have minimal impact on users' interactions. Location-awareness information is one such feature that is becoming more prevalent on mobile devices. However, the best way to utilize this information and the corresponding social implications of its use, remains unclear.The overall goal of this research is to explore how mobile technologies can enhance social coordination (specifically rendezvousing) between users and better understand Interacting with Computers 17 (2005) 542-566 www.elsevier.com/locate/intcom 0953-5438/$ -see front matter q