Here is a Guide for installing firmware 1600.2489.8107.12072 on your Nokia Lumia 800 if you cannot wait for official release from Nokia.
Whats New in this Update:
- Improved Battery Life
- Improvements in the Camera UI/Department
- Bugfix volume
- Improved Detection of Charger
So Heads over to Source Link and follow the instructions.Translate the Google via Google Translator or your prefer translator because its in Italian
INFINITY TECH 
I will wait for it rather then damaging my beautiful Lumia