I've been watching this one because I'm not entirely convinced it won't hit much closer to Houston. I've already alerted my son to consider going to his Dad's house on Lake Livingston if Katrina gets closer. When I called him earlier yesterday, he wasn't even aware there was a hurricane in the gulf. He's not a big television watcher.
The thing to watch for is the expected turn to the NW, that is supposed to happen by Sunday afternoon. If it doesn't then Katrina will come ashore well west of the forecast and Houston could get some effects. Definately something to keep an eye on.