Sure, there's SQL and PL/SQL - the "big" appdev features. But there are also many other, "smaller" features.
For example, Continuous Query Notification:
Continuous Query Notification (CQN) lets an application register queries with the database for either object change notification (the default) or query result change notification. . . . If a query is registered for query result change notification (QRCN), the database notifies the application whenever a transaction changes the result of the query and commits.That's very cool, all by itself.
This is exactly the kind of research and resource I hoped the ODA team would do and produce, so kudos to Dan for helping make my vision a reality.
I look forward to lots more of the same from all members of the team.