MySpace and Microsoft.com are two of the most-visited Web sites on the planet. Come to this session to hear about lessons learned using Microsoft technologies to run Web applications on a massive scale. Representatives from Microsoft.com talk about lessons learned using an all-Microsoft datacenter. Representatives from MySpace talk about the realities of using Microsoft technologies in a scalable, federated environment using SQL Server 2005, .NET 2.0 and IIS 6 on Windows Server 2003 64-bit editions. This session features an open Q&A with a panel of technical managers and engineers from MySpace and Microsoft.com.