For those who think IIS is not good enough, safe enough, capable, used etc, then have a look at this article.  It seems that now IIS accounts for more Fortune 1000 companies web sites than all the competition put together.  If you are developing or recommending, it looks like more business opportunity exists in the IIS world than anywhere else.  If you want to know a bit more about developing solutions, look at http://permalink.gmane.org/gmane.education.web4lib/10138 and Microsoft to Release Windows Server 2008 RCO, and for some IIS7 webcasts .. IIS7 Web casts 

IIS Outserves Apache on Fortune 1000 Websites while ASP.NET Deployments Grow

Since 2003, Port80 Software has periodically surveyed the public sites of Fortune 1000 companies to determine their use of web and application hosting technologies. In a survey released in mid-August, the Microsoft Internet Information Services 6.0 Web server (IIS 6) gained 9.5 percent since August 2006 and passed IIS 5 to lead the survey for the first time, outserving the open source Apache server and all other web servers among Fortune 1000 sites. Overall, IIS 4, 5, 6 and 7 deployments continue a four-year lead in the survey with a combined 55.0 percent share of all Fortune 1000 corporate sites versus Apache's 24.9 percent share.

In a related Port80 Software survey, Microsoft ASP.NET and ASP application server environments are currently used on 51.5 percent of Fortune 1000 sites, an increase of 7.9 percent since 2005. Other application servers like Java platforms (J2EE, JSP, WebLogic, WebSphere, and Tomcat), PHP, and ColdFusion all combined to account for 24.0 percent of Fortune 1000 site deployments. Heavier use of ASP.NET among Fortune 1000 sites is to be expected, given the prevalence of Microsoft IIS on the same sites.

Much has changed since 2003, when Apache's dominance was relatively unquestioned in the industry. "While Netcraft's recent surveys demonstrate the rise of Microsoft's Internet Information Services across the Internet at large, Port80 Software continues to see IIS beating Apache among leading U.S. enterprise companies," Joseph Lima, Director of Product Development at Port80 Software. "Having analyzed Fortune 1000 Web sites for years now, we estimate that IIS 6 penetration will continue unabated while IIS 5/Windows 2000 servers are decommissioned, with a few Apache defections along the way. If the trend from previous surveys holds, IIS 7 should be the dominant Web server for Fortune 1000 sites by 2011."

Port80 Software will offer IIS 7-compatible versions of its products by early 2008 to leverage the new extensibility model in IIS 7 on Windows Server 2008, the upcoming new server OS from Microsoft previously codenamed "Longhorn." While known for its Web performance products, Port80 also augments IIS security with its ServerMask™ and LinkDeny™ tools for less than $200 per server. Port80's upcoming ServerDefender™ Web application firewalls will also add crucial protection against damaging web hacker attacks often reported by security organizations like SANS Institute, OWASP, and more (www.port80software.com/ security).

IIS Outserves Apache on Fortune 1000 Websites while ASP.NET Deployments Grow

ttfn

David