Silverlight and WCF chatroom ''site''

I would like a person to enter negotiations about developing a silverlight chat component for a website. The website will require the user to navigate around the and end up in a chat room. The chat room will require users to allow send messages to the room and send messages to each other. I expect that the messages will be using the publisher subscriber method. You will only be producing the chat room component and what ever it needs to be hosted.