One of the cool new additions in the latest BlackBerry 10.2 SDK release is the Identity Service Library. This library allows developers to tie into a external identity provider, like BlackBerry ID or even Facebook/Twitter/etc, to log into their app. This way you can allow users to use the authentication information they already have in their accounts tab to sign into your app. What I like about this is it saves you from having to remember yet another login.
The coolest part is that BlackBerry has specifically added the ability for developers to tie into the BlackBerry ID system to authenticate users. This is a direction I was really hoping BlackBerry was going with BBID and now it is here. Even better is the ability BlackBerry adds to store a limited amount of data about the user in the cloud in encrypted storage that is tied to a users BBID. That hopefully means app settings can be backed up to the BlackBerry Cloud.
Check out the new Identity Service Library documentation here