How to Build a facebook app that uses facebook database?

I'm trying to build a facebook app that can display current playing song on the user's profile page, via a link to the app or preferably embedded on the profile page.

I read online, and found that facebook doesn't allow iframes on profiles. Due to this, I'm hoping to display tracks played via the right-panel on "home" page @ facebook.com. Spotify posts this perfectly to display what anyone is listening to via the right sidebar. I read that spotify is a facebook partner due to which any number of posts/updates are allowed via spotify. Is this valid without any payment too?

For example, I need to either post each song played to user's profile, and if that's not allowed, then a link on the profile to visit a facebook app that has the content to be displayed (now playing song).

I'm good at javascript and php, but I don't know a way of doing this... this is what I have in mind:

Let

1. Let users sign up for the app, then let them download AMIP (tool require to log playing songs on major media players).


2. Once they download and set it up, they should add something like: http://ift.tt/1yI0lw1 to the AMIP settings and that's almost all the settings required.


3. Another alternative was to create a standalone php application (exe) that would send the data to facebook, and the url in AMIP could be sent to this exe. But I've never created any portable/standalone php app, I only know it exists for non-webserver alternative purpose. I thought this would required only for login purpose, cause then the app won't be secured, anyone could just enter anyone's userid in AMIP url for generating false music logs.


4. Once the settings have been done, user starts listening to music and with AMIP the song info goes to facebook app, where it collects (if it's database driven), about 5 most recent songs with their song info.


5. So anyone visiting the profile, can either see embedded detail, or visit via link to the app page to see the friend's current song playing info.

Now I don't know how to get this done. Any suggestions or links to tutorials/code-snippets/or someone who is good at this could just create and share the app link with me? You may consider this as an idea for a facebook app. And probably share it on github too!

Thanks.