Win29 is up and going.
Win28 is the only remaining on in update, it will be going until it is done. There is no estimate at this point of when that will be, simply when it is done it will be done. If we stop at this point it will be corrupt, it will probably go a bit past the maintenance window but no choice in the matter.
Win28 IIS is currently up, and has been for a while, but may go back down again with the patches.