This is what I got from Maugan's article:

If you're running big boost in a 1000 horsepower 'street' car that's been tuned for it, E85 is good stuff.
But, if you are NA, driving to and from work, E85's lower cost is offset by it's poorer mileage and potential for serious fuel system (injectors, seals, etc.) damage. I'm not sure that this stuff is more or less corrosive than gasoline, but it seems to be cause for worry.

Does that about sum it up?