In IE7, the next version of Microsoft’s web browser, the company will adopt Firefox's RSS feed icon, effectively making the orange square with white radio waves the industry standard. In what seems like a welcome sign of future co-operation to come between Microsoft and Mozilla, representatives from Microsoft took a trip down to Mozilla's Mountain View offices to work out a deal.

"We all agreed that it’s in the user’s best interest to have one common icon to represent RSS and RSS-related features in a browser," the Microsoft team wrote. The team had said in October that it would design an original RSS icon.
Similarly, the next version of Outlook e-mail client (its 12 incarnation) will also use the orange icon.