Here is an update, although not much has changed.
The BC Moore rankings seem updated for some of my information, but I did see he had Newman losing to West Fork, instead of the other way around.
District 1
HMS is the champ, Gehlen is #2, Hinton and South O'Brien winner is #3, loser is #4. South O'Brien is a favorite according to BC Moore.
District 2
West Hancock is the champ, if North Union beat Newman then that could create a 3 way tie in which I think Saint Ansgar would be the #2, but I think you will see Newman at #2, STA #3, and North Union #4
District 3
Grundy Center is the Champ, Wapsie is #2, Nashua Plainfield vs Hudson is for #3, more then likely both of those teams are in no matter what (NP is), however if BCLUW pulled the upset on Wapsie they could get in.
District 4
North Linn, East Buc, Maquoketa Valley are all in, if Maquoketa Valley beat North Linn it would cause a 3 way tie. I believe Bellevue is in as the #4 no matter what also. I expect North Linn to win (BC Moore predicts this) and win the title with East Buc at #2 and Maq Valley #3
District 5
Columbus vs Alburnett (this is the proper way to spell it) for the title. BC Moore has Alburnett as a slight favorite. Lisbon is #3 and Wapello is #4.
District 6
This district is all wrapped up 1. Lynnville Sully 2. Madrid 3. Ogden 4. Belle Plaine
District 7
AHSTW is the champ, Mt. Ayr vs. Southwest Valley for the #2 (Mt Ayr is the favorite) and Earlham should be the #4, however there is a 3 way tie possibility .
District 8
Woodbury Central is the champ, Lo-Ma is #2, Tri Center vs. Westwood for #3, Tri Center is a favorite.
Here is what I have for matchups
HMS vs. North Union
West Hancock vs Hudson (or NP)
Grundy Center vs. Belle Plaine
North Linn (or East Buc) vs. Wapello
Alburnett/Columbus vs. Bellevue
Lynville Sully vs. Earlham
AHSTW vs. Westwood (or Tri Center)
Woodbury Central vs. Hinton or South OB
Gehlen vs. Tri Center or Westwood
Newman vs. NP (or Hudson)
Wapsie vs. St Ansgar
Eac Buc (or North Linn) vs. Lisbon
Alburnett/ Columbus vs. Maq Valley
Madrid vs. SW Valley
Mt Ayr vs. Ogden
LoMa vs. South OB or Hinton