The station near my house (in San Antonio, TX) went up from $1.83 to $1.97 in one day, and all others I've seen today have had similar increases. This is for the "cheap" gas too, since it's all my car needs.
I have an 18 gallon tank too....
Edit: But at least I don't have a big truck like one of my friends. I don't exactly know what kind of mileage he gets or how big his gas tank is, but he told me that once the counter reached $35, he just couldn't bring himself to fill it up any more...
I remember thinking $1.39 was high, and that was probably only 8 months ago.