Sorry, I didn't pay much attention to the baudrate...
I correct it, now it says:
I2CScanner ready!
starting scanning of I2C bus from 1 to 100…
and then nothing else...
for debugging, I've added some "print" lines after each command of http://www.sparkfun.com/tutorial/Barometric/BMP085_Example_Code.pde , and I've discovered thant it hangs after trying to read calibration values. I set this as comment to see if the rest of program works, but no answer, it stops when trying to communicate via I2C. Port A4 & A5 are good, I've done some analog input measures and all seems ok.
Could be that breakout/sensor has been damaged during delivery? how should I check if the breakout board is damaged? soldering is so little, I'm scared to try to resolder it!
For the shield, it's a basic vetronite proto board adapted to Arduino so no problem for 5V