well... the sketch works fine, the i2c not... no adresses found 
i checked port a4 and a5, they are both ok and give 5v on digital write.
i check the power to the bma020 an every wire transmitts the voltage as its supposed to.
so in my opinion there are two possible answers:
- my bma020 ist broken
- there is a mistake in my circuit.
for the second point i made the schematic of my circuit here:
http://www.dz863.com/drawsch_1354.html
and uploaded a photo of the board wiring...(please dont laugh 
)
it would be great if you could take a look at those two and verify they are ok... then i can porbabaly buy a new bma020...
