I caught something on BBC America that folks were kicked out of their homes (and not compensated) and neighborhoods razed to make way for Olympic venues.

But...
I think the decision to go with Beijing was really an invitation to China to play on the world stage in a positive light. If you want to run with the big dogs, then there are certain rules you have to follow. This will certainly shine the spotlight on China - for good or for ill. I just hope nothing bad happens.