Much will depend on what other members of the Big 12 do in the coming days. It could end up that the Big 12 folds after losing too many members, meaning the Buffs wouldn't have to pay to make the conference switch.
At this point, Pac-10 commissioner Larry Scott said the plan is still for the Buffs to enter the league for the start of the 2012-13 school year.
"What a special day," Scott said. "This is an historic and landmark day for the Pac-10 Conference."