I am really happy this gesture is being done. As an Australian I feel the government has wronged the Aborigines for long enough and it's about time they took some responsibility for their actions.
The truth is that this has to be the beginning of something more substantial. Words are nice but they don't carry very far. Actions on the other hand... The Australian government has to help the Aborigines improve their quality of life, creating opportunities for them to succeed in Australia's society.
After this is done apologies will actually have a meaning.