This NetNewsWire pro screen shot will probably make sense to AppleScript scripters only.
It shows a script getting properties of “every subscription whose RSS URL contains apple.com.”
Of course you’ll be able to do more than just get data from NetNewsWire—but getting data is the easiest place to start, so that’s where I started.
Just so no one’s confused—the screen shot is of Script Editor. NetNewsWire is running but not shown (since its GUI is irrelevant to this screen shot).