Here are my "unofficial" top 4 seed lines with regions and pod sites assigned. Just for kicks.

  East South Midwest West
1 UNCRaleigh MemphisLittle Rock KansasOmaha UCLAAnaheim
2 TennesseeBirmingham TexasLittle Rock DukeRaleigh WisconsinOmaha
3 GeorgetownBirmingham StanfordAnaheim XavierD.C. ButlerD.C.
4 IndianaDenver LouisvilleTampa DrakeDenver PittTampa

Note: Indiana was moved up to the No. 4 line because to satisfy bracketing rules.