LAS VEGAS -- How have recent games -- the Big East wrapping up its regular season and the Big 12 one game from its finish -- impacted Bracketology? Charlie Creme updates the top four seeds in each regional, noting a new No. 2 seed -- Florida State moving past West Virginia and Xavier -- behind Stanford in the Sacramento Regional. And Texas Tech, despite Wednesday's loss to Baylor, still has an edge against other bubble teams such as Michigan, Maryland and Kansas, among others. Check back throughout Championship Week for Bracketology updates.