Not a pure Arduino question really. I'm actually using a standalone ATmega168. So far I've been using AVR-ISP programmer (working from AVR Studio) to program the chip. After everything is done, the chip will be covered and I will only have access to the I2C pins. The MISO,MOSI, etc pins will be unreachable.
I was just wondering if there was a way to use the I2C pins to update the program that is burned on the chip. I won't need to burn the bootloader again, but just to update the program if it needs to be.