Over the past few evenings, I've refactored File_Fortune to have it implement Iterator, Countable, and ArrayAccess -- basically allowing it to act like an array for most intents and purposes. As a result, I've eliminated the need for the File_Fortune_Writer package, and greatly simplified the usage.
The package is designed to make an interface between the casual PHP user and the fortune files common on most *nix machines. To illustrate he update, he includes some code that grabs the fortune file, parses it to grab a random one and echoes them out. Also included is the save() method so you can add your own to the list easily.