Content Delivery Network setup (CDN)

Hello, We have two streaming multimedia servers located in London and New York. We need both of them to be linked together to provide a Content Delivery Network service, more information on how a CDN works can be found here: [login to view URL] We need advice on what CDN software to purchase, we will obviously pay for any expenses, we would require you to set the software up. Anyone experienced in this field please feel free to bid.