If you disable the reset pin, by accident or in order to use it as an I/O pin, you will need to use HVP or debugWire to use ISP programming again.

Atmel 8-bit AVR is my favourite - there's a great community at avrfreaks.net to tell you all you need to know. It uses the GCC toolchain with a decent* free IDE from Atmel.

I2C as many of you know, is a simple serial interface for many peripheral devices to micro controllers, but it can quickly become confusing to people who may not be accustom to it. Because of that,… ...