This past weekend I was at a quilt show and the LQS in my parents' town had this wonderful product called "Ta Da". It is an interfacing that you iron on to your fabric that has the bias lines on it. It makes perfect bias strips and you will never have wrinkles in your bias strips and it gives it more stability for longer wear.
I just called them and they will ship. One package will do at least a queen-sized quilt. I plan on getting some the next time I go to visit. (I am kicking myself for not doing so this past weekend!!!)
Anyway, if you are interested, the store is called "Fringe" in Salida, CO and they sell the packages for $7.50 each. 719-539-4006.