Following the increased session timeouts for both web- and desktop-based apps, the Developer TOS has been updated to reflect this. Again, outside applications may make use of select user data for the duration of this session.
Also remember - users expect the same privacy guarantees they enjoy on Facebook. If a piece of data is protected by our privacy controls when a user is on Facebook, Development Platform apps should respect that privacy when creating their experience as well. As a reminder, we've clarified the Developer TOS for you.
Happy hacking, and expect some very useful updates soon.