There is no question that x86 servers helped to drive the first generation of Web applications. Unfortunately, much of the infrastructure that built the Web is proving insufficient to carry it forward into the Participation Age. Demanding Web 2.0 applications along with millions of new users joining the Web each week are fueling the need for capacity and scalability. At the same time, organizations now face very real challenges in terms of rapidly deploying applications, managing complexity and server sprawl, and coping with power, cooling, and real estate limitations. It is clear that the next generation of Web-tier infrastructure must accomplish even more.