The latest update for the APM missiong planner (v1.09) inclused two new major features. The first feature is speech synthesis which allows the GCS to talk to you announcing various events such as reaching waypoints, allowing you to keep track of whats happening without looking down at the GCS.
The second feature that has been added is the ability for data logging which allows you to record and play back your missions directly on the APM software, which means you dont have a download the flight logs from the Ardupilot Mega boards each time.
You can find the latest download here
The latest update to the APM mission planner has a new feature for integrated OSD video. Allowing you to turn the artificial horizon into a heads up display without the need for any additional hardware! This allows you to view your live video with the artificial horizon overlayed over it. To enable this feature you need to select your video feed from the flight planner tab, this will replace the artificial horizon background with your live video.
The latest feature in ardupilot mega is the ability to tell your UAV to fly to a point on the map by selecting "fly to here". Once the UAV is there it will loiter until you give it a new waypoint. All this in real time. More related features to be released soon