I just checked the NHC's web site for their 2AM update.
They show no real movement in Katrina's path - it still appears to be coming in right over NO.
of course, there's a lot of time left yet. We could still see a slight eastward drift that would bring it closer to Gulfport or Biloxi.
NO would then potentially be spared the cataclysmic direct hit that's been feared.