Love your avatar.
I just made one last week-end out of a dog food bag. used the instructions from BHGC "Quilts & More", the Fall 2010 issue.
It is really simple. clean your bag. just wipe it or air it out in the sunshine. use webbing in a length adjustable to hang over your shoulders. you can square out the bottom [just like a regular tote, if you wish].
It is an easy, fun project just a 'novelty'. My bag is over sized, the original bag holds over 40 pounds of food.