Reveal tab/Fan-gating in Drupal for Facebook

Hi,
I've just landed to Drupal, while having quite a good experience in LAMP+JS and Facebook APIs implementations. In the same time there is at this moment the cut-off to Timeline, with the migration of business/fan pages into Facebook apps (the proof is this very site that I've surfed a bit).
I would like to do a quick catch-up on using Drupal for Facebook modules, therefore before even downloading the project on my dev, for playing with, I would kindly ask you if you can direct me there where I could quickly implement a 2-page Timeline application on the Fan-gating principle, i.e. to redirect the visitor if liked or not the first page of the app.
Is this feature existing in the project?
If not, how and where can I hook the PHP standard snippet (I prefer the PHP SDK) into the Drupal structure?
Thanks!

Often with Drupal there's

Often with Drupal there's more than one way to do something. With a little experience you'll figure out what works best for your app.

If you use fb_tab.module, you'll see it can be configured to show a different drupal page depending on whether user likes the page or not.

Thanks, I'll do. The best is

Thanks, I'll do. The best is to use what's already enabled, so I may bother you
in the future to fully take advantage of your work & expertise ;-) ...

See above

hook_init() ... if you are a PHP developer