Inversion of the digital IO pins

[ConKbot of Doom]

I was hoping to use an external EEPROM to store data for our autonomous routine, it uses an I2C interface, but I have code written to bit-bang, so that is ok, but here is my question. I know the pins are inverted as an input, since when they are low, you get a 1 in software, and when they are high, you get a 0. But are they inverted as outputs too?

Thanks