We regularly get questions on whether moss can scale to x thousand users. I know this is easily possible even on modest hardware. However now there is something better to tell our customers:

How about running one of the biggest/busiest web sites on the planet earth running on MOSS?

Yes, exactly! We are moving microsoft.com to the MOSS platform: http://www.microsoft.com/about/mspreview/en/us/abouthomepage.mspx

just in case the page changes (it might get updated with more exciting info) I will copy/paste the relevant bits here for your reading pleasure:

Some of the biggest changes are ones you don’t see. In the background we are beginning to migrate much of Microsoft.com to a new platform based on Microsoft Office SharePoint Server 2007. Using Office SharePoint Server 2007 will bring us a broad range of new capabilities that will help you more easily find the information, products, and services you’re looking for across our site. Microsoft.com is the 5th most visited Web site on the Internet, hosting hundreds of thousands of pages of content. Running our site on Office SharePoint Server 2007 goes a long way in demonstrating to customers worldwide that the product is reliable and provides an effective solution for managing vast amounts of content.

So ok I exaggerated; we are only the 5th most visited web site on this planet but you get the idea. If your company wants to update their public web site to be more easily manageable and improve its performance take a good look at MOSS. It has awesome performance, content management, personalization etc etc.