Connection Manager enhancements
With these enhancements you can modify configuration parameters without shutting down Connection Manager and can use improved access rules for filtering traffic.
Improvements to the Database Resource Manager
Using the new version of Database Resource Manager (DRM), you can define a service group by service name, application, host machine, or the operating system username of a user.
Oracle Streams enhancements
With Oracle Database 10g, it is easier to programmatically interact with queues.