How can I make a Facebook RSS application that autoupdates from the provided RSS feeds. Of course doing this is trivial for canvas applications, but I need this for showing on the Facebook Page. All the RSS apps I've taken a look at either dont update or dont work on Facebook Pages.
Especially now that infinite session keys are deprecated (and maybe even forbidden).
To get anything to show on the facebook canvass you need to first know that anything you do within the application resides out of the facebook servers, so its not so much about how it works on facebook but how it works on your servers. to link into the facebook pages you need to follow the instructions found here: http://wiki.developers.facebook.com/index.php/Creating_Your_First_Application
and here is another good read:
http://wiki.developers.facebook.com/index.php/FAQ
these should help you get all the help you need.
I specifically said I do not need this for canvas applications (as that is trivial to do), but on Facebook Pages! This is done with profile.setFBML and data published that way does reside on the facebook servers.
You have two options.
Convert your user session (when the user accesses your app manually) to infinite session, then periodically update the profile information for a user. There is some information on how to do this (and what API calls you can make without sessions) here.
Create a new "handle" (see fb:ref) for each unique feed and update that handle whenever the feed changes. Handles are key-values pairs that are associated with your app, that you can include inline through FBML. This allows you to do a single call to the API that will update all users subscribed to a given feed.
The second option is probably the best in the long run.