I tested some mogas at a gas station over a hundred miles east of Dallas in a small town and found ethanol in the gas. There weren't any labels on the pumps. I just saw this new story where the Oklahoma Legislature passed a law requiring gas stations to label ethanol blends.

Interesting video:

http://www.clipsyndicate.com/publish/video/616070/ethanol_testing_to_gas_stations?wpid=0

Here in Oklahoma City, we have a bunch of stations that are advertising with big signs out in front Ethanol Free. They run about 5 to 10 cents per gallon higher than the el-cheep'os. They appear to be doing rather well at it also.
 
We have had E10 in the winter for years. I gassed up at a very large station in January, no label, but I knew better than to think it might not have ethanol. Don't trust labels, always test it.