Here are a few links you may find useful.
Ned May, an artist and computer wizard, developed a program for creating spirals based on the Fibonacci series. I used his program to create the spirals in a number of my quilts. Check out his site and the generator: Custom Fibonacci Spiral Generator .
RaNae Merrill is a New York quilt artist who also designs fabrics. Her fabrics have excellent value variations, and I have used them in several quilts. Check them out: RaNae Merrill fabrics .
Quilt Art is an active email list with discussions of many topics of interest to art quilters.
Gloderworks designed this web site. They have been wonderful to work with.
I find inkjet printing fascinating, although I have not yet done much. The inkjet fabric printing list is an excellent way to get information on the current innovations in printing.