In the very first public display of collaboration of it's kind (at least I think it's first, correct me if I'm wrong)… Microsoft & Mozilla Foundation have a common agreeement over the RSS icon. People using Mozilla family of browsers will be delighted to know that it's still orange! In a post made on IEBlog by IE Team members it was made public "that it’s in the user’s best interest to have one common icon to represent RSS and RSS-related features in a browser. And the winner is…"
It is really exciting to see collaboration between competitors in the best interest of their customers I hope to see many more examples of cooperation between the 2 organizations.