Want to really impress your friends with the N9? Download Air UI for the Nokia N9. Air UI is a free app for your N9 that It uses your front facing camera to allow you to control your N9 without touching it.
I have been using it on my N9 for a little bit now and it works pretty good. It’s not perfect but it is fun to “Air Swipe” photos, and change songs with it. Here is all the information from Nokia about it.
Air UI is an application which allows you to interact with your Nokia N9 with simple gestures over the front camera without actually touching the device. The supported gestures are left/right hand waves and camera cover.
Air UI works with Gallery, Music, Documents and other apps. It does not work with the 3 home views.
Note that on installation you will be prompted to accept an additional application and restart the phone to complete the process
Want to try it? You can download it here.