I want to break out, I want to breeeeaaaaaak out.....

I know, I know, the worst Queen pun ever.
But with the Raspberry Pi, one of the coolest things is that you can use the GPIO pins to interface with other bits of electronics, and my second Pi (the first is my Media Centre at home running RaspBMC) is now set up with a breakout board and case to make it a little more robust.

Not sure why this uploaded upside down....

I got the breakout board from RasPi Mart on Ebay (http://www.ebay.co.uk/itm/271455580745) and it is actually a really good deal for around 6GBP.

Here is a closeup:

You will notice that there are 8 GPIO pins broken out (P0 to P7) as well as the UART, I2C, SPI, etc. I found it difficult to find detailed information on which pin on the breakout corresponds to which BCM GPIO pin. I traced them, and being the nice sort of fellow I am, I'll detail them for you below. Bear in mind this is a Rev 2 Pi and this board is labelled "Raspberry Pi GPIO Extension Board V2.2", so if you don't have those precise items, YMMV.

Breakout Pin	BCM Pin	Notes
P0	GPIO17
P1	GPIO18	Also PWM pin.
P2	GPIO27	Was GPIO21 on Rev1 Pi.
P3	GPIO22
P4	GPIO23
P5	GPIO24
P6	GPIO25
P7	GPIO4	Also the 1Wire pin by default.
I2C SDA	GPIO2	Was GPIO0 on Rev1 Pi.
I2C SCL	GPIO3	Was GPIO1 on Rev1 Pi.
UART TXD	GPIO14
UART RXD	GPIO15
SPI MISO	GPIO9
SPI MOSI	GPIO10
SPI SCLK	GPIO11
SPI CE1	GPIO7
SPI CE0	GPIO8

I hope the above is useful to you, and helps you get the most out of your Raspberry Pi GPIO experimenting!