The newest bracket was actually posted yesterday so you can look at those by clicking on the usual links.
The biggest mover was Minnesota. In just a little more than a year, Tubby Smith has his team contending in an unusually strong Big 11. However, their season-to-date hasn't yielded a quality road win so far so don't crown them yet (the Louisville win was on a neutral court). Home dates against Michigan State and Ohio State await this week.
Stanford jumps in this week as they are the only undefeated team in the Pac-10 and they just beat Texas Tech by 45 at home. But with only this and a Northwestern win, poor performances against the Arizona schools this weekend will kick them out.
The matrix gets updated on a (mostly) daily basis starting Monday. Also, brackets can only be at most one week old to stay in the matrix on a particular day.