If gas prices continue to rise over the summer I would almost bet that you'll see an adjustment to these. If you think about it, the changes that are made (other than the lines and tank) are something most of us do when modifying a vehicle anyway (for performance reasons) although not entirely required (on turbomustangs.com there is a guy who has been running it for 9 months with no issues and made over 1000hp to the wheels on it). The issue is, we need to have companies other than the BIG OIL companies provide us with these alternatives, if Exxon, BP, etc are the ones to "help us out", nothing will come of it as they will find a way to rape us with E85 as they do oil. The nice thing about e85 is that in order to "produce" it, you don't need a multi-million dollar drilling rig, the refining of it is the issue. However, I think the more people ask/talk/push for it the better it is, it's not much cheaper (if any), but it's replenishable and local which are two HUGE benefits.