Arduino Duemilanove + ADXL345 + ITG-3200

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