Building a 16X32 LED Matrix

Those grids wont do. I am going full scale and each block will be approximately 1ft sq.

I will be using 1 Watt Luxeon LEDs.

edit:

I found the playground by means of google. But where does it show how to link multiple arduinos together to cover a grid of 8X16 or bigger?

Are there specific tutorials for my project. Take a look at this video below, its pretty much what i plan on doing.