No, weavers cloth has nothing to do with cross stitching.
It is a cotton/polyester blend that is heavier than muslin but not near as heavy as denim, but has a denim like texture to it.
I have used it to make summer weight slacks and shorts many times.
The only 2 places I have found it have been at JoAnn Fabrics or ETC or at Hancock Fabrics. If you do not have these stores in your area, they both have websites that you can order fabric from.
I can see it being a really great fabric to needlepunch on.
Hope this helps. :D