http://www.topsharepoint.com/fortune-500-companies-using-sharepoint
http://www.ferrari.com
http://www.wssdemo.com/Pages/websites.aspx
http://nexsus.aptikom.or.id
and how to know that website use SharePoint is:
open page source,
find :
sharepoint
or
another way:
Most of them never delete the default css and images that comes with default install of SharePoint.
So if you spoof the URL little like
http://<
you can see your SharePoint friends
example:
http://www.ferrari.com/_layouts/images/homepagetopzoneimage.jpg
or
http://sharepoint.microsoft.com/_layouts/images/homepagetopzoneimage.jpg
but, how I want know which version it is ?
you can use this way:
http://<
example:
http://www.ferrari.com/_vti_pvt/buildversion.cnf
or
http://sharepoint.microsoft.com/_vti_pvt/buildversion.cnf