The Tibet protests are the headline ones. There are other ones about the lack of human rights around.

http://www.amnesty.org/ for instance has a campaign that looks at the rights to a fair trial.

Now the Olympic games are a mass advertising event.

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As for the Olympic Torch relay, one can just read how it was incepted to see that it was and always has remained a propaganda vehicle (either for governments or companies).

Wiki:
The Olympic Flame from the ancient games was reintroduced during the 1928 Olympic Games. An employee of the Electric Utility of Amsterdam, lit the first Olympic flame in the Marathon Tower of the Olympic Stadium in Amsterdam.

The modern convention of moving the Olympic Flame via a relay system from Olympia to the Olympic venue began with the 1936 Summer Olympics in Berlin, Germany.

The relay, captured in Leni Riefenstahl's film Olympia, was part of the Nazi propaganda machine’s attempt to add myth and mystique to Adolf Hitler’s regime. Hitler saw the link with the ancient Games as the perfect way to illustrate his belief that classical Greece was an Aryan forerunner of the modern German Reich.