Ike is now larger than Katrina was, both in its radius of tropical storm force winds–275 miles–and in it radius of hurricane force winds–115 miles. For comparison, Katrina’s tropical storm and hurricane force winds extended out 230 and 105 miles, respectively.
So pretty much anyone on the Texas coast has the chance to get at least tropical storm strength winds.
BTW, Corpus Christi to Port Aurhur (edges of the ‘cone of probablity’) is about 250 miles. In other words, the tropical storm winds now is wider than the projected landfall possibilities.