Source one. Note blended with. Needs a petroleum base. The highest blend I can find on the Net is 85% petroleum based/ 15 Soybased.
http://www.biodiesel.org/resources/biodiesel_basics/default.shtm
Source two cites the use of Ehtanol is possible as a pure fuel source but does not cite any examples of it in use. All existing ethanol usesage is listend in fuel blends. This source also cites the problem. The energy used to produce the enthanol exceeds the energy gained using the enthanol. Like electricity, you have to have some energy source to produce it. Thus you must use oil or coal or some energy source to produce the ethanol which produces LESS enegry then if you simply used the oil as gas.
http://en.wikipedia.org/wiki/Ethanol_fuel#Ethanol_fuels
You appear to be a bit behind on the current state of the ethanol industry - the energy ballance is positive.
http://www.ethanol.org/documents/NetEnergyBalanceissuebrief.pdf
http://www.ethanol.org/documents/ScienceJournalJanuary2006_000.pdf
http://www.ethanol.org/documents/NetEnergyBalanceofEthanol.pdf