The BBC News did a very nice piece with people's tributes to Heath Ledger. Here are a couple:
Heath has touched so many people on so many different levels during his short life but few had the pleasure of truly knowing him. He was a down to earth, generous, kind-hearted, life-loving, unselfish individual who was extremely inspirational to many.
Heath Ledger's father Kim
It is tragic that we have lost one of our nation's finest actors in the prime of his life. Heath Ledger's diverse and challenging roles will be remembered as some of the great performances by an Australian actor.
Australian Prime Minister Kevin Rudd