RoamX provides support for the user-controlled management of a distributed X desktop, potentially spanning multiple administrative domains. Instead of terminating X-based applications and restarting them manually elsewhere, applications can be suspended and restored selectively on different machines while preserving their context and state. The migration of the GUI is accomplished by an extended version of xmove, a pseudoserver for X window movement, developed originally by Solomita et al. (1994) at the University of Columbia. RoamX applies CORBA, Jini and JavaCards together in its infrastructure, three sophisticated, supplementary, but rather distinct technologies. This paper describes the implementation, deployment, and experiences gained throughout the development of RoamX.