Hello!  Im new working with Arduino and device on I2C bus.
I've Arduino Duemilanove board connected on AN4 and AN5 analog pins (I2C bus) to sparkfun breakout board for ADXL345 and a ITG-3200 breakoutboard. I use external 2.2k pull-up resistor on I2C bus. I use the Duemilanove powered by USB connection and 3.3v from Duemilanove for sensors. Can i have problem about voltage compatibility on I2C bus with sensors that use 3.3v?  Thanks