>>>Cornell/Berkley independent study
That study is crap. It uses old data, and does not take into account changes in the technology in ethanol production and farming.
Current information can be found at:
http://www.ethanol.org/documents/ScienceJournalJanuary2006_000.pdf
http://www.ethanol.org/documents/NetEnergyBalanceofEthanol.pdf - this one specifically debunks your pals from Cornell/Berkley.
>>>What do you have from truly independent sources concerning the viability of ethanol without subsidies?<<<
Again, the issue of subsidies is irrelevant until you factor in the subsidies into the cost of petrol. I've provided documentation that shows petrol is far more subsidized than ethanol. Can you disprove that or not?