Sync a rso

Hello I have only been learning ActionScript for a few weeks coming from Java and Javascript. I need some help with code.I have a remote shared object for my Flash Media Server Project. I like to store a list of all connected clients to a chat room that is visible to multiple users. When a clients connects, or disconnects from the application I want the list to be revised and all clients connected will see that changes in real-time. I am unsure the best way to approach this. I was thinking of using a changeList property to create an array that describes the change properties of a persistent shared object. Is that feasible to do, or is there a easier alternative? Finally, I be grateful if you could provide me a small sample of code to do this then I can take it from there. Thanks.