Wikipedia? The universal encyclopedia has only 13 employees and developed a true collaborative culture within its management by involving volounteers at every level.
Google? The Web giant employed a PR guy who explained in a book how to develop guerrilla marketing in the Internet. His secret: hit and go away - always surprise.
If you want to know more about these and many more people I met during my trip to the United States as International Visitor, please listen to the brief I gave in cafebabel.com headquarters. And share your thoughts in the comments!