From Wizards of the Coast:
“We recognize the important role third party publishing support plays in the success of the 4th Edition of Dungeons & Dragons. We have listened to the community and our valued colleagues and have taken their concerns and recommendations to heart. Our commitment to the health of the industry and hobby gaming lifestyle is reflected in the revisions to the Game System License.”
–Linae Foster D&D Licensing Manager
No information on when except “the revised documents will be available in the very near future.”