IBM’s P2P Tool?

uServ Project Page

One reason for the web’s success is that it makes it extremely easy to access content. uServ is a system that makes publishing content just as easy, and at a very low cost. uServ harnesses existing desktop computing infrastructure, allowing its users to pool resources to provide high availability web hosting and file sharing. By using existing web and internet protocols (e.g. HTTP, DNS), uServ does not require those who access uServ-published content to install special purpose software. Its high availability, wide accessibility, and low cost make uServ a superior alternative to paid hosting services and other content sharing networks for a wide class of users.