Rendering custom content on page tab

Hello,

I have googled and searched through the issue queue and looked at the documentation and I'm still at zero on how about to achieve this. Below is a quote from developers.facebook.com:

In addition, your application will also receive a string parameter called app_data as part of signed_request if an app_data parameter was set in the original query string in the URL your tab is loaded on: That could look like this: "http://www.facebook.com/YourPage?v=app_1234567890&app_data=any_string_here". You can use that to customize the content you render if you control the generation of the link.

Is it possible to render custom content; map page id with an ifram and redirect to the appropriate content. The way I perceive drupal for facebook right now, is that I would neet to create a new app for each iframe, but I'd like to have one where each page has its own related content, is that an improbable usecase for drupal for facebook?

Thanks so much if you can point me in the right direction.

Best Regards,
Helgi.