Great thread.
Apart from the stuff in the other thread
1. Greasy spoon awards.
2. Instead of just a pilot telling you about an airfield how about approaching the SATCO of said field and asking what some of the normal vistor cockups that occur.
3. Engineering niggles: not ripping the pee outa one organisation but if someone has a long on going problem which seems to be going in circles (usually electrical i must admit) what the problem was and the solution.
4. ATC section is a must if you can get a ATC type to write about GA errors and misconceptions.
5. Section on whats changed in the AIP and ANO and don't just do the GA stuff. There are some of us who fly bigger machines who still enjoy GA. For not much extra space you will have a happier pro readership as well.
MJ