I promised I would post an update to my Rag Rug Tutorial after I washed the rug.
Here's a picture after one washing in a top loading washer.
It was on the floor in front of the sink for about 3 months before I washed it so it received heavy wear.
This is easily my favorite of all the different kinds of rag rugs I have made. It stays flat, and is very cushy to stand on. It traps dirt and pet fur and is easily shaken out in between washings.