Indeed. For those who haven't seen the story, China is planning to control the weather at the 2008 Olympics by using silver iodide and dry ice. For those who don't know, silver iodide is an inhalation hazard, as well as being bad for the skin, according to the MSDS sheets for the chemical. Aside from the obvious health hazards of using these chemicals, any change to the global weather will affect weather patterns worldwide (the butterfly effect). I would hate to see any athletes come home with lung or skin damage due to the problems Chinese weather control could cause. This wouldn't have been needed had they built a stadium with a roof, but it is a chance for China to exert their dominance in front of the whole world.
Human rights violations are also a big part of the reason we should not support these Olympic games. China has evicted roughly 1.5 million citizens to make room for the Olympic events - (source: COHRE). Interestingly, there is a provision in the Chinese "constitution" that references eminent domain, but doesn't seem to mention any form of compensation for people who are forcibly removed from their homes - (source: Chapter IX, Article 108, bullet point 14 of the Chinese constitution). I seem to recall something similar from the 1996 Olympics in Atlanta, where people were also removed from the area, but can't find a link right now...so I can't back it up.

China also represents a huge market for American corporations, which is why nothing is going to happen regarding any boycott...there is too much money to be made on the deal. China has spent roughly $2 billion dollars US on their Olympic plans so far, less than a week's trade imbalance with the US, so it is obvious they already have us by the throat.
A noble goal, but taking a look at the 1936 Olympic boycott, I am not hopeful. At least in 1936 a few athletes stood up for their beliefs.

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