^^ Sorry to barge in but please don't make the argument that they did wrong so the suffering to their people is right. Its just a bad argument plus i don't think its Tibetan philosophy also.
There is very little anyone can do with what China decides. If they don't allow journalists inside China(Tibet) people just accept that. When they ban websites,filter results, its the same. Its not something they are doing for Tibet alone. Look back at the history and its done regularly for every issue(including now in the case of the Earthquake and conflicting reports over death toll). Its the basis for Communism, selective news release.
Having said that, Democracies like us suffer due to overdose of journalism, and many wish for some control too
Nothing ever is perfect in the world.
As long as the Chinese continue to have the economic muscle power(which ain't going very soon) and the people of that country are relatively happy with the communists, it will be hard to rein in the Communists or make them see reason. (Btw Burma shows its hard even if they don't have economic muscle power, but Burma has tacit Chinese support)