Here is a 'scorecard' by conference for 1994, the second year I kept these data. I thought this might be useful info since the regionals are a major source of inter-conference and inter-region play that helps determine the relative strength and hence future seedings of teams from various regions and conferences.
Here is the 'histogram' of the success rate for the 1994 NCAA regionals.
------ wins ------
Conference Number 0 1 2 3+ champ comments ...
========== ====== === === === === ===== -----------------
SEC 4 2 2 VERY strong showing
ACC 4 2 2 almost as strong
Pac-10 4 1 2 1 " " "
Big-8 3 1 1 1 needs Texas ;-)
Big-West 3 1 1 1
SWC 2 1 1 missed TexasTech
SunBelt 2 2 underrated
WAC 2 1 1 * BYU came close
Big-10 2 1 1 ouch!
Metro 2 1 1 pretty weak
Southern 2 1 1 justify two slots?
Southland 2 1 1 " " "
MAC 2 2 not deserving
Mo-Valley 2 2 pathetic
Ind-Miami(FL) 1 1 they're back!
Midwest Coll. 1 1 * Big-10 needs N.D.
Big-South 1 1 O.K. showing
Midwest 1 1 O.K. showing
Colonial 1 1 ?
Atlantic-10 1 1 playin team
Mid-Continent 1 1 playin team
West Coast 1 1 playin team
Big-East 1 1 they need Miami
North Atlantic 1 1 ?
Northeast 1 1 playin team
TransAmerica 1 1 playin team
* denotes that a team with 2 wins was the runner up in the regional