hi, i see you have got the ds1307 working, i am trying to do the same but no luck. can you give me a few examples of how to read the time from the chip? am pretty sure i have it wired up correctly. SCL to analgue 5 and SDA to analogue 4. do i need to do anything with SQW?
I think to use I2C you have to use the analogue pins 4 and 5. if you look at the pin descriptions http://www.arduino.cc/en/Hacking/Atmega168Hardware you can see SCL and SDA are there. Maybe i'm wrong though and it is possible to use the digital pins.