Well, the wheels are back on now. All the hangers were worn oval, but the wear around the holes was coverd by the heads of the bolts. Here is a photo with the hanger removed and the top bushing partially out. Notice it is worn right through on the bottom. The lower bushing is still in the walking beam, but you can see the crack at the top. It wasn't quite worn through.
This is what it should look like. The new bushings installed, ready for the new hangers. Remember, this was after 12,000 miles. Not a very long life for a suspension system.