MSFT Team RSS Blog: The choice of what icon to use is challenging because it should be universally symbolic, but today there is no single icon for that represents feed. Instead thereâs a variety of mostly orange rectangles with the words âXMLâ, âRSSâ, âATOMâ, âFEEDâ, or âSubscribe.â
http://blogs.msdn.com/rssteam/archive/2005/10/08/478505.aspx
Randy: Microsoft is looking for help to determine what icon they should use in IE7 to represent a feed (RSS or Atom). The icons they are considering are all images. I'm partial to something readable, like Subscribe.