What hardware is needed to get started with the Wiring Platf

Hi,

I am new to electronics (almost) and I am looking for a guide for choosing the hardware needed to use the wiring.org software.

I am a bit confused because I am seeing several different designs of the wiring i/o board and the wiring mini. Some look like they have combined to two into one board.

What are the essentials? Do I need a special power adapter or will a wall wart from the bin in the garage do? Do I need a led display to see what I am doing? etc

Please help someone new to the field get started.

Thanks