The probability is that if H5N1 were to hit the United States (which I doubt will happen this year because, well... flu season is almost over people) it will be much different then how it is effecting Asia. I have spent much time traveling and living in many countries in Asia, and the population is in much poorer health then in America. In China and Vietnam, people live on rice gruel, with very little meat and veggies. They have very different and more comprised immune systems, and they are less likely to get medical care. No one has died in Europe from bird flu, and it unlikely that anyone will in the coming months. Remember SARS? SARS was supposed to be the 'big' killer disease, which was human-to-human transmitted. SARS killed hundreds of people in Asia, and 20 in the West. Just as quickly are SARS came, SARS left.
I just don't believe in creating mass panic... The news in America is creating this problem with predictions that it will mutate in 6 months, millions will die, etc. etc, so that they can sell more newspapers. I am currently traveling through western Europe (UK and France) where there is H5N1, and millions of birds have been 'killed', and no one is worried one bit. People are still eating half-cooked duck liver, chicken, raw eggs, etc. People are not stock piling medication or food. They are living their lives, which I think more Americans need to do. It can't hurt to have a couple of weeks of food and water in your house, but that is because in-this-day-in-age there are many different threats (weather/earthquakes/terror/disease), but there is no need to change your entire lifestyle.

Going down to eat my seared foie gras for dinner.