Joanna, if you look at a map of Thailand (I just did), Bangkok is way up at the top of the Gulf, whereas Phuket is out on the ocean side, totally exposed to the force of the tsunami. I have not heard of any reports of damage in Bangkok. If Phuket is on your itinerary, that could well change, and I would bet they would instead call on a port in Malaysia, which isn't too far away, that got less damage.
