First, the US agriculture industry has always produced as much as it possibly can, if anything, the government has historically paid to lower production (which is a completely different argument). Look at it this way, if there was no ethanol, do you think we'd be producing less overall? No, the producer always grows as much as possible, even when, at times, it isn't in his best interest to do so.
Second, I don't agree with the statement on jumping on government incentives to use land for fuel instead of food. Farms simply produce grain/meat/etc and sell at the highest price possible, whether it goes for food or fuel doesn't really matter because from their standpoint it is a business, and they have to get as much money for their product as possible. The problem is at the next level up, where corporations that build ethanol plants get the incentives that artificially raise the price. As for subsidies that go straight to the farmer, when prices are this high, it doesn't really matter because we don't need the subsidies then. When the prices are low, they're needed because if they weren't there farmers across the country would go under, causing a bigger shift to giving companies like Cargill and ADM even more control over the industry. Trust me, farmers would much rather not get subsidies, they would rather get a fair price for their crops and make a living without the government help. At times that is possible, other times, it just isn't.
Full disclosure: check out this website:
http://farm.ewg.org/ This shows the subsidies that went to every single farmer in the country. I looked in the database for my home county, over the past years, as grain prices have risen, the major grain producers have slid off the list, and the list of the highest subsidies is dominated by dairy farms, which have continued to struggle after the price of grains recovered. (remember, if you're running a dairy farm, that high price of grain is an expense, not a revenue)
edit: actually, just looked, we came in at $0 for 2009, just as any of the other crop farmers did, which is good to see, that the subsidies aren't given out when prices are high.