I think the application could benefit from additional prompting and directions at several steps. Specifically,
- Tell user they need to link their twitter/fb/etc account before continuing to the "reading" screen for these applications. If you drop the person in the login screen, they might not know why they need to log into another service.
- When you start the configuration activity, it isn't immediately clear that the user needs to setup the application. A splash screen before the configuration steps would be useful.
- It might also be good to separate the apps in the drawer based on whether they have previously been linked.