The BYU Cougars are your 2007 Mountain West Conference champions.
According to the Associated Press, "Harvey Unga ran 11 yards for a touchdown with 38 seconds left as No. 23 Brigham Young rallied to beat Utah 17-10 Saturday, winning the state rivalry for the second straight year and clinching a second consecutive outright conference title... The Cougars (9-2, 7-0 Mountain West) converted on fourth-and-18 with 1:05 remaining to keep the final drive going, then got 30 yards on a personal foul and a pass interference calls against Utah."
NCAA Football - Utah Utes/Brigham Young Cougars Recap Saturday November 24, 2007 - Yahoo! Sports