Quinton Jackson won't have to wait until January to be cleared to fight again, according to this report from Steve Sievert:

With no serious damage done to his left leg, former UFC light heavyweight champion Quinton Jackson is expected back in the gym Monday.  

Jackson, who lost a hard-fought and--in the eyes of many--controversial five-round decision to Forrest Griffin at UFC 86 Saturday, had his leg examined today and was cleared to resume training next week.  He will have to avoid any immediate direct contact to the still-tender lower part of the leg.

Jackson's shin, not the knee, absorbed most of the punishment from Griffin's kicks, according to Ibarra, who believes the match should happen right away.

It will be very interesting to see Dana's next move here.  Forrest and Chuck is a money match, but Rampage-Forrest has the potential to be a series that establishes two men as legends on Chuck's level, and Chuck doesn't have much time left.  Here is my prediction:  Forrest and Quinton fight on the October or November PPV, and if Chuck beats Rashad, he fights the winner early next year.  I suspect it may depend on the main event at UFC 87, because outside of Chuck and Forrest, there is one other option for a big main event in December:  BJ Penn and Georges St. Pierre.

Also, here's an idea for the UFC:  They should air a Quinton Jackson vs. Forrest Griffin special on July 26th opposite of Elite XC on CBS.  Let a few million people see the fight and decision for themselves, the rematch will sell itself.