1. A communication system providing communication between a client and a server, the system comprising: a client mobile device having hardware and software to exchange information with other devices over a network; the client mobile communication device including a storage medium that stores data and program instructions and further stores a representation of dynamic phone book data including contact information and network content information; the client mobile communication device further comprising a processor that executes the stored program instructions with said stored data; the client mobile communication device further comprising an interface that simultaneously displays a representation of said dynamic phone book data including said contact information and said network content information in a same application window; wherein said application window is responsive to an application that maintains said dynamic phone book data substantially updated with a corresponding state of said dynamic phone book data obtained by the client mobile communication device from said other devices over said network.