Well, now that the PHB has been released, it appears that the free D&D Basic Rules have been updated as well. I am not exactly sure what all is changed/updated in this one as I have not had the chance to read through but you can get the copies here;
Basic Rules for Dungeons & Dragons (http://dnd.wizards.com/articles/features/basicrules)
EDIT: They also released the Dungeon Master's D&D Basic Rules V1 (found at the same link above)