Another site (for comparative purposes) is
www.t-shirt-quilts.com. She is very specific on her site about her delivery times and what you can expect. Her pricing is on the high-end, but I feel that people will value a quilt more if they understand the cost and effort that goes into it. I am working on a t-shirt quilt for my cousin's daughter and I have done a lot of custom placement of the shirts with traditional quilt squares (eg., flying geese, pinwheels) in the sashing. It's an artistic project for me, so I'm willing to put the extra effort in it and don't really expect the compensation for my time and effort. I know they will love it.