Facebook app help - I want to make a daily feed that reads text when a button is pressed
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Okay, I have never done the facebook app thing before, but I have been researching it extensively.  facebook developer pages are a train wreck of information.  I don't necessarily need code, just some resources, theories, guidance or ideas about how to solve this particular challenge (and if it is even possible to do on facebook).  I don't use personally use facebook apps, and so I am kinda retarded about what can / can't be done with them.  Many of the articles/videos are outdated and I don't know if they still apply because facebook developer interface has changed since.

I have a very simple website (php, javascript, mysql) with one button.  On page load, it loads text for todays date into a hidden div tag, and there a button that you press that audibly reads that text (text to speech) via an external speech engine link.

I want to implement this in a facebook app where folks can subscribe and get the new text each day that is read out loud by pressing a button in their main feed page, similar to some apps that embed a video as a daily feed, where the video can be viewed on the users facebook feed.  I have no idea where to start implementing this kind of functionality within facebook.

I just want the button, a hidden div containing the daily text, the title of the website, and when the button is pressed, EITHER it dynamically reads the text through the app via the external TTS engine, OR plays an mp3 of the text (I am able to save an mp3 of the text).  I would prefer to NOT do the mp3 thing if possible because I have random intros and endings that get loaded from the db before and after the daily text. 

I figured out to embed my webpage into the facebook canvass, but that's not really what I am looking to do.  I would prefer instead to create the small app that shows up in the users feed.  I also am unclear about how the daily feed is implemented, In other words, does facebook load the app on the user's feed daily, or is this something that has to be programmed by the app developer?  Can you embed PHP and javascript in these type of user feed apps?

Any guidance or further resources on any of this would be appreciated
  