My Funky+DS18B20 temperature logging project is still running on that same CR2032 battery ever since my original post back in Oct 31st 2012, that makes it 7 months of run time so far.
I have a live chart here:
It is probably at the end of its life, but having said so, probably will kick for a month at least. Amazing stuff.
My other project – Funky+DHT22 is also still running on the original AAA battery, it is located outside and has the purpose of logging outside relative humidity and temperature.
Here are the readings for the period: