The new URL is listed further down on the page; basically oatile1 has changed to otile1, so that the URL is more consistent with URL used for the MapQuest Open Map Tiles.
Here's an example URL for an Open Aerial Tile: http://otile1.mqcdn.com/tiles/1.0.0/sat/15/5240/12661.jpg
If you change ..../sat/... to .../map/... in the URL, you'll get the Open Map Tile for that specific area.