It's kind of hard for me to get into writing heavy previews for the Frozen Four when basically all you can say is "Either team could get good goaltending and a bounce here or there and win". If the results of these games had anything to do with statistics and match-ups, none of these teams, save BU would be here. Anything could happen. You might as well flip a coin.
Luckily, other people aren't as jaded and lazy as I am and have written wonderful previews on the games this weekend.
Bruce Ciskie at FanHouse wrote pieces on Vermont, and Miami. He also chronicles Bemiji State's attempt to get into the WCHA. I do think it's kind of funny that a Frozen Four team can't get into the WCHA, and a WCHA team couldn't get into the Frozen Four.
College Hockey News has a ton of articles related to the four teams.