Live Web Broadcasting

Hello, I am interested in having a qualified experienced web design programmer and graphic artist develop a social media site that will allow members to do their own live broadcasting over the internet, similar to that of [login to view URL] For now, my main concern is regarding the bandwidth. What type of server would be needed to handle the live video/audio data. At this time I can not specify how many members will create their own live shows, but I would like to assume it would be a heavily used site. Specification regarding the project will be submitted at a later time to the qualified programmer. The bid submitted is for the question regarding the handeling of the bandwidth at a cost effective manner. Another bid will be submitted with detailed descriptions of the project when appropriate. I look forward to hearing from all experienced web programmers. Sincerely, Sam