Relevant info is here:
Grindstone is unbanned.
Painter's Servant is banned.
What does this mean for the online Commander player? Well for me at least, it means that Painter's has to come out of my Oona deck.
While the EDH RC doesn't control the Commander format, Wizards has followed their recommendations pretty much to the letter until now and I dont' expect them to break from that anytime soon.
Also, there is usually some lag time between the EDH announcement and the online implementation so we'll either have until the 20th of Dec or possibly until the 20th of Jan.
I'm kind of sad to see this.
I realize that Iona was probably the proverbial straw and that Painters will only get more broken as time goes by. I also know that banning Iona instead of