Windows Server 2003 with IIS6 has REALLY improved the scalability factors for web hosting environments. Here’s a bit of news that I hope will become a technical case study.

Go Daddy to Transition All Its Parked Domains From Linux to Microsoft

REDMOND, Wash., March 21 /PRNewswire-FirstCall/ -- Microsoft Corp. (Nasdaq: MSFT - News) today announced that GoDaddy.com®, the world's leading domain name registrar, is transitioning approximately 4.5 million Web domains to be hosted on the Microsoft® Solution for Windows®-based Hosting. Upon completion of the migration, Go Daddy® will have moved all its parked domains from Linux to the Windows platform.

http://biz.yahoo.com/prnews/060321/sftu089.html