Abstract: A number of directory servers non-exclusively engage a first plurality of servers to serve as master servers for hosting one or more application services, and a second plurality of servers to serve as slave servers for facilitating clients accesses to the one or more hosted application services. During operation, the directory servers receiving requests from clients to access a selected one or selected ones of the one or more hosted application services. In response, the directory servers select and assign selected ones of their non-exclusively engaged master servers to host the one or more accessed application services as well as select and assign selected ones of their engaged slave servers to facilitate the clients to access the one or more hosted application services. In one embodiment, the hosted application service is a hosted Internet Talk Radio System and its hosted multi-party talk radio shows.