Well, Australia is right into saying sorry to each other at the moment. I'm half expecting the Eagles to say sorry for being a crap team or Shayne Warne to say sorry for being an arrogant idiot.
Still, here's the next 2 extremes.
1) (the big one) The Australian government (at least the labor government) is going to apologise to what we call "the stolen generation." A whole generation of native Australian's that were taken away from their families and either put into white homes or childrens home... both close to slavery... where many were abused and neglected which has lead to huge problems in todays societies. Saying sorry to 30,000 people is a pretty hard ask but they're doing it, finally, after 11 years of the previous government refusing to.
2) 100 priests in Australia got together and collectively apologised to the gay community for not letting them into communion and for just plain rejecting them. This is not the church saying sorry but it's a start. Their explanation was "Jesus forgave everyone for their sins so why can't we? He forgave a prostitute so why not gays?"