I have revamped the animation classes that were used in the game.  They are far more generic and more powerful.  The animation descriptions are read from an XML file instead of being hardcoded in the game.  Also, the textured quad is no longer responsible for managing the texture coordinates, that task is designated to a helper class.  All in all, these new classes will allow me to freely use them in other projects.  It was a painless transition, and the code is much cleaner.  I should have a complete game soon!
Feel free to check out the current status of the project at codeplex.