Living in Omaha...you can kind of say that I have a pressing local interest. Surprisingly though, there are a lot of people who are die-hard CWS fans who really don't follow the season at all.
I definitely pay attention to the Big XII and it helps that my Huskers are playing phenomenally right now - makes it easy.
Other good baseball schools include, LSU, Miami (FL), and Texas (all of these are glaring omissions from the previous list). Nebraska used to be a doormat in the old Big 8 days, but since 2000 has been to the CWS three times and a top 8 National seed several times. You can also include Oklahoma State and Arizona as historically good teams.
I would definitely not include UCLA or Ole Miss in the previous list though.
The Wikipedia article showing CWS Appearances and titles
http://en.wikipedia.org/wiki/College...ces_.26_titles
Boyd's World does a pretty good job of predicting RPI's for teams during the season to give you an idea of where teams stack up.
http://boydsworld.com/baseball/rpi/currentrpi.html