Hi again,
I managed to find a post that might answer this question:
http://codehackcreate.com/archives/166
According to this, using arduino pro mini 3.3v and supplying 4.5v to the RAW power pin:
With the "ArduinoSleepCode" he managed to get ".. around 200 microamps..".
So he got a current draw of 200uA without turning the ADC, PRR, LED, etc... off.
I wonder how low can the current draw get if we implement Nick Gammon's guide: "Power saving techniques for microprocessors"
If anybody can confirm this data, or experimented on the manner, please reply what you think.
When I get an arduino pro mini, I'll check and post the results myself...
Thanks