They are still not officially accepting since it is not available for international payments (e.g. the whole world).
Maybe to you, but to me overstock.com accepts bitcoin. Trying to dispute that fact is just dumb. Overstock.com IS accepting bitcoin.
Coinbase and overstock are both US companies, by the way.
Just seems to me that it is a little misleading and egocentric to claim that overstock now "officially" accepts BTC when they only accept it in the U.S.