The recent Arcadia had a tier listing plus interview with Mago and Nemo. They compiled two lists - a "Global" list based on info they've compiled from talking to players, on messageboards, etc. And an Arcadia list that they themselves put together.
"Global" Ranking
A: Guile, Abel, Chun, Bison, E.Honda, Balrog, Rose, Blanka
B: Ryu, Sim, Vega, Ken, Rufus, C.Viper, Akuma, Fei, Cammy, Gouken, ELF, Cody, Sagat, Ibuki, Zangief, Seth, Guy, Adon
C: Sakura, Dudley, Juri, Dee Jay, Hakan, Makoto, Dan, T.Hawk, Gen
Arcadia Ranking
A: Balrog, E.Honda, Guile, Fei Long, Cammy, Rufus
B: Abel, Bison, Blanka, Chun, Viper, Ryu, Dhalsim, Akuma, Sagat, Rose, Ibuki, Gief, ELF, Vega, Gouken, Ken, Seth
C: Adon, Dee Jay, Juri, Dudley, Cody
D: Gen, Sakura, Guy, Dan, T.Hawk, Hakan, Makoto
Quick summary of the Mago/Nemo interview -
Mago proposes Balrog, Honda, Cammy, Fei Long, and Guile as top-tier. Especially Balrog. Nemo more or less agrees. Balrog didn't particularly change much, but since Sagat/Akuma dropped life became easier for him. Guile is top, but still has some hard fights such as Fuerte and Rose.
Mago doesn't feel that Ken/Vega are that strong. Ken still has problems with Blanka, Bison, and Sim. Vega still has problems with he gets rushed down.
Nemo says that Chun is solid, but still has problems with Viper and Akuma. He also feels that Rose will drop a bit - good footsies, but runs into problems when rushed down.