This is a pic of the floor that I made and you can see it carried through the two rooms.
After sharing the end results with like minded crafters, I ended up making this instructional video for those who wanted more info on how to create them. It's a one shot deal so pardon the bumps and such. So, here it is, my first video ever...enjoy (and please be kind!) Make sure to keep scrolling to get the link to the free grid generator once you are done watching.
Now you know the how of it and to make it your own, you can add different distressing techniques and paint jobs for a one of a kind look.
To make your own custom grids and download them as PDFs visit: http://incompetech.com/graphpaper/square.html