Well, maybe not the entire world, but at least according to this Network world article it is becoming the de-facto collaboration platform!
http://www.networkworld.com/newsletters/gwm/2007/1217msg1.html
<a href="www.iaffari.com/.../a>
is going to lead the world in a very short time.SharePoint 2007 will improve organizational efficiency by offering one unified suite of enterprise critical needs such as managing and maintaining content and business processes, empowering people within your organization to make better informed decisions and simplifying how people collaborate.