Good news for me since I'm in the ethanol industry...
As of right now they're saying 15% for 2007 and newer cars. The ethanol industry was pushing for a straight 12% but the EPA has too many reservations regarding older cars. This 10/15 tier system may not be the best solution since the cost of implementation to gas stations and blenders is going to be much higher since they're making/supplying/selling two blends rather than just one.
http://finance.yahoo.com/news/US-Sai...7&asset=&ccode
(I'll move to politics section if discussion goes that direction)
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