Similar to what they did for the Super Bowl, Facebook's data team has put together a map showing which states have been "buzzing" the most (based on Facebook chatter) about which Sweet Sixteen teams.
Upsets rock, so Dayton dominates in most states that don't have an remaining rooting interest. That New Mexico goes for Stanford, Nebraska goes for Baylor, Oregon goes for Wisconsin, and Kansas goes for Kentucky reveals a key characteristic of this methodology: Not all buzz is positive.
Nevada was not represented in the tournament this year, so obviously that state is most interested in Florida, the Vegas favorite.