There's a new E85 station on Scottsdale Rd. and McKellips on the Scottsdale / Tempe border. It's a Valero on the SE corner and they also have race gas. Last time I was there (last week) the E85 was $3.39/gal. and the race gas was $7.99/gal.
Please buy your ethanol there. I want them to keep it. The location is perfect!