I have created a Facebook app for the flea market Facebook groups in my area. (Feel free to take a look at http://loppis.blekinge.it/)
To read and manage posts I use the Facebook Graph API, but there are a number of limitations:
- My application supports deleting posts, but Facebook does not allow applications to delete a photo
- Real-time Updates do not include support for groups (so I have to poll)
- Reading the Group feed and and using the since and until parameters do not guarantee that you find all posts in a high-traffic group, not even when using the previous and next links in the feed
Update Maybe I should start using FQL to query the Group feed?