I just wanted to keep you updated on the progress of my project: it has been waiting for components from China for almost 60 days now!. I live here in Brazil (South America), where things from eBay, AliExpress, etc take forever to arrive (due to our horribly slow state-run mail system!!).
Anyway, as thing slowly arrive to me, I make some progress: I have everything shown in the picture below, but still miss the following:
A) DIL16 socket for ATMEGA328 (Arduino),
B) BMP180 pressure/temperature sensor.
When I receive at least the DIL socket on the mail I will be able to start testing my neat little weather station, so stay tuned :)