Robinson...
I'm going to say what the floor is, at least what I think it is.
I believe this poster also posts on another board I frequent and we've found that at teacher supply stores, they have bulletin board paper in rolls, they have one called Weathered Wood. I think it is about 12.99 a roll.
However, I found that unless you already have a hard floor surface, that paper just crinkles and looks bad...so many people are spray glueing it to plywood. The plywood itself is 18 or so dollars, and I think that makes it too heavy to move.
Here is an example in this thread...
Great Deal - Photographing Your Life - BabyCenter
So here is what I've found. At Lowes, the wood paneling.... They come in 8 foot sections, in many many colors, from dark cherry all the way down to white wash. I asked them to cut one for me in a 5 foot section, so now I have one 5 foot and one 3 foot. It was like 13 dollars.
It is what I used here...