The first time I discovered that you could even get into a plane I thought it was a Dev after thought. I could get into them but all I could do was drive them around like a jeep. I looked thru the forums and found out that you could actually fly them but I could never figure it out. It was very frustrating. It would be cool if they made flying planes more important
(not like a flight Sim), maybe as an add-on. As for now it's fun just using them in the Editor.
Here's an example
http://vimeo.com/9594494