Not sure if this has been brought up yet. I'm sure it has been discussed on Final Four TV coverage at some point, but I don't have cable...
I was checking out the ESPN preview for the games tonight and noticed all 4 teams were undefeated in the "Last 5 Games" section. Didn't seem noteworthy at first as they are obviously on 4 game win streaks just to get to the FF. Then, this took me wayyyyyy to long to put together, I realized that this meant all 4 of them won their conference tourney.
After some time on wikipedia, I found that this is the first time since 2008 that all 4 teams in the FF were conf. tourney champs (maybe not "technically" anymore with the Memphis wins being vacated, haha). 2008 was the FF with all 1 seeds (UCLA, UNC, Memphis, Kansas), although Steph Curry almost had something to say about that...
Not sure if this happened at all before 2008 (too much research for me), but it's cool to recognize either way. The current winning streaks for the teams:
Loyola - 14
Michigan - 13
Villanova - 9
Kansas - 7