Windows Server 2008 comes with Internet Information Services 7.0 (IIS7), a Web server and security-enhanced, easy-to-manage platform for developing and reliably hosting Web applications and services. A major enhancement to the Windows Web platform, IIS7 includes a componentized architecture for greater flexibility and control.

Here is a list of some providers

http://www.microsoft.com/serviceproviders/hosting/windowsserver2008/directory.mspx