Okay, here's my update: the weaker conference teams have to go undefeated to get a potential wildcard invite to the Elite Eight... TCU and Marshall this year wouldn't qualify, but Marshall in 2001 would... and as long as there are no other worthier teams (like Texas this year. It hurt me to not include them in my top 8. I guess I could bump Boise St since they lost that one to Arkansas, heh-heh.)
I like the update. Marshall did have a good year a couple years back now that you mention it.