Wasn't sure if there was a place to enter feature requests, but I ran into somethign I think might be useful. In the Mission Planner, it would be great if the software would warn you if you have created or changed waypoints but not written them to the device prior to leaving the screen. Or in fact, if you arm the device without writing the changes. I ran into this the other day - I had laid out a mission at home, but when I got to eht field, I wanted to edit it. I loaded the waypoints from teh APM, moved them but forgot to send back to APM. Was pretty surprised when the quad went merrily past the place I expected it to turn.
In fact, it might be interesting to consider having any current waypoints in the APM be displayed in a different color on the map than new ones just entered or ones that have been moved.