Windows Server 2008 includes improved Web administration, diagnostics, development, and application tools with Internet Information Services 7.0 (IIS 7.0), a major upgrade from IIS 6.0. Windows Server 2008 unifies the Microsoft Web publishing platform, including IIS 7.0, ASP.NET, Windows Communication Foundation, and Windows SharePoint Services.

Modular design and installation options allow installation of only the features needed, reducing attack surfaces and making patch management easier.

IIS Manager, a new task-based management interface, plus a new appcmd.exe command-line tool make administration easier.

Cross-site deployment allows you to easily copy Web site settings across multiple Web servers without additional configuration.

Delegated administration of applications and sites lets you give control to different parts of the Web server to those who need it.

Integrated Web server health management with comprehensive diagnostic and troubleshooting tools allow easy visibility and tracking of requests running on the Web server.

Programmatic access to configuration stores through WM or Microsoft.Web.Administration, a new management API that enables editing the XML configuration files for your Web server, sites, or applications.

Enhanced application pool isolation keeps sites and applications isolated from each other for greater security and stability.

Fast CGI support to reliably run PHP apps, Perl scripts, and Ruby applications.

Tighter integration with ASP.NET features and one configuration store for all Web platform configuration settings across IIS 7.0 and ASP.NET.

A flexible extensibility model enables customization such as the addition of new modules using either native or managed code.

Official website of iis.net
Windows Server 2008 Hosting Overview