I have done nothing on the aerial photography front for awhile now and needed an excuse to go fly again so I ordered the DJI iOSD from UAVproducts.com (or available on Amazon if you prefer that). I plan on using this to orient myself to my home location and get a more accurate read on battery voltage while I am flying. In case you don't know, it overlays your FPV feed with data from your onboard flight controller (the Naza) and has a bunch of useful stuff on it. Think of it like a heads up display in an advanced aircraft! My friend Ian has had the iOSD for awhile now and has nothing but good things to say about it, so I had to try it out! More on this when I get it.
I live in Haiku on the island of Maui and it can be really humid here. I kept opening up my hard protective case to find a layer of dew all over my Phantom. To solve this problem, I ordered a bunch of silca packets and I drop three of them into the case every month or two and it seems to have solved the moisture problem! You should be able to get these anywhere, but I ordered mine from Amazon because I order everything from Amazon!! Here is a picture of the packaging as well as a link. These are great if you are in a humid place or plan on visiting a humid place and want to avoid a rusted gimbal like mine (although it still works perfectly!).
Another awesome purchase I can now easily recommend to Hubsan X4 owners is the 5 pack of extra batteries offered on Amazon for around $20. They have more capacity than the stock pack and you can really tell - it seems like it flies forever! These are 380mah and take a bit longer to charge on the stock charger, but you can easily make a hookup to use your existing charger if you want a better charge. Luckily these are only 1 cell so they don't need to be balanced. With the recent price drop of the Hubsan X4, throwing in 5 additional batteries is something to consider if you want to be able to fly for what seemed like a solid hour or more. Lots of practice. These batteries are a bit bigger, but you can still squeeze them in. I would stop flying as soon as you get your voltage warning (blinking lights) to prevent them from puffing up. If they puff, I am not sure they would still fit.
I took my extra batteries, my hubsan x4, and my two boys and went to a playground. It is a challenging place to fly and a great training ground to improve your RC skills. I wanted to get some cooler pictures, but I had to fly and take the picture at the same time so I could not really get the pictures I wanted but figured I would post them up here anyway.