One example: http://www.iris.washington.edu/about/ENO/iows/9_2004b.htm "Hurricanes can easily be recorded by seismographs
No, that's not an example of a hurricane causing an earthquake.
Just because an event can be recorded on a seismograph, does not mean it caused an earthquake. Seismographs can even register sonic booms if I am not mistaken. But sonic booms do not cause earthquakes either.
My first point was that Katrina is causing the earth to shake right now.
As for the secondary point, actually nobody knows what can trigger large earthquakes. But it's theorized that other remote earth tremors and maybe lots of water over a fault can. So it's quite a longshot, but a huge hurricane shaking the earth and dumping a million tons of water on a fault that's ready to pop can't be ruled out as a zero probability.