Remember, you read about it here first!
Although if you go to the Official DirectX page on Microsoft's server here
, you will see that its still version 8.1 thats available, Microsoft have indeed placed the final build of DirectX 9 on their servers
and its available to download here
. Please note that this is a web based installer, and not the self-contained distribution of DirectX which is around 9MB I believe.
In case you are wondering how I got the link, it was from here
I imagine that an official announcement will soon be placed on Microsoft's main page here
and on the Official DirectX page here