This document summarizes research into how blackberries and mobile devices impact work practices at an engineering firm. Interviews were conducted with 46 employees across four user groups - corporate managers, local operations managers, technical specialists, and mobile operations engineers. The research found tensions between individual efficiency and overwhelming others, speed of exchange versus quality of exchange, and issues of visibility, accessibility, and being observed through mobile email use. The conclusions discuss why these tensions exist and what organizations can do to address them through reflection and informed practice.