The jets are an interesting addition to the game. They are very slow, and don't expect to put a gun on one unless you have a lot of tape and crazy glue (the term "gunner's seat" is misleading unless changed in some forthcoming patch. It would make pvp crazier than it already is though. At the moment I'm trying to find how many bridges I can fly under. There is a nice one in the top right corner of Ame, NE of Wolverine. Nice small bridge at the bottom of Athena canyon. Also, there is a cool move you can make when say the passenger jumps out of the jet. If the pilot holds it steady, the passenger can right click the jet with in first person aim and get back on board. Of course if the pilot moves over a bit, the passenger ends up munched on the ground. And it seems that if you land in a spawn of really big ugly mobs - spiders for example - they don't see you until you step out of the jet (thanks to Brads for that one). Jumping out of a jet into water seems to be safe as well.
Sweet we have a plain in a soc :D if you need help with finding nice bridges them give a call and ill look for some or if ill find one ill give you a call :)