so - for what it's worth:
Tweet from Pete Thamel:  (July 26 - 4:04pm)
Sources:  Colorado is in discussions about a move to the Big-12, and the school has just completed a board meeting and scheduled another for tomorrow to discuss the move.  The Big-12 is also holding a Presidents' meeting tonight where there's expected to be an expansion update.
more tweets:
from Jason Scheer:
Colorado is likely to move within the next 48 hours.  Also, there's another school in the Pac-12 beyond the rumored four corners that will surprise people and is seriously contemplating a jump to the Big-12.
and from Greg Swaim
BREAKING NEWS:  Colorado BOR meeting just ended and they've scheduled an additional meeting for tomorrow for a vote on a potential move to the Big-12.  
stay tuned.