Early Tatsunoko vs. Capcom: Ultimate All-Stars tiers list

The game has only been out since late January 2010, so what you'll find below is a basic ranking of the characters without a full on match up chart. Important Note: These rankings could change dramatically as the game continues to age.
Marn recently took 1st place in Final Round XIII TvC UAS tourney and looks like he'll be one of the top players in competitions this year, while Nyoronoru is the resident expert on the game.
As with all tier listing, these should also be taken with a grain of salt as they never tell the whole story. Even top players often disagree with each other as to how the rankings stack up overall.
Marn's Tier Rankings
S Rank:Zero, Alex, Jun The Swan
A Rank:
Tekkaman Blade, Saki, Ryu, Chun-Li, Yatterman-1, Yatterman-2, Joe The Condor, Frank West, PTX-40A
B Rank:
Karas, Casshan, Polimar, Doronjo, Tekkaman, Ippatsuman, MegaMan Volnutt, Roll, Batsu
C Rank:
Morrigan, Ken The Eagle, Kaijin No Soki, Viewtiful Joe
D Rank:
Gold Lightan
Nyoronoru's Tier Rankings
S Rank:Tekkaman Blade, Ryu
A Rank:
Chun-Li, Jun the Swan, Ippatsuman, MegaMan Volnutt, Saki, Kaijin No Soki, Yatterman-1, Zero
B Rank:
Alex, Batsu, Casshan, Doronjo, Frank West, Joe The Condor, Karas, Ken The Eagle, Morrigan, Polimar, PTX-40A, Tekkaman, Yatterman-2
C Rank:
Roll, Viewtiful Joe
D Rank:
Gold Lightan