E-85 can be found at quite a few stations in this area (of course our legislators are pushing ethanol hard - 10% is mandatory, 20% will be mandatory in several years).
Most stations are pricing it exactly 40 cents a gallon below the regular unleaded price. Assuming your mileage goes down 20% using it, the 40 cent diferential makes it no cheaper to use with regular unleaded running anything aboe $2 a gallon (currently around 2.59 or so).
Cheaper to buy? Yes. Cheaper to burn? Questionable at current pricing.