According to this (and a ton of other reports), Street Fighter IV project manager Shizowa has said on his blog that Capcom is to show a new character for the upcoming fighter this Friday. Using squinto-vision, we'd be pretty surprised if those fighters aren't Chun Li and Blanka. This makes us more excited than an evacuee on VE Day. Should give Friday a bit of a pep, anyway.
Update: That was quick. Famitsu's confirmed Chun Li, Blanka, Guile, Eddie Honda and Dhalsim are all in the game. Too much. Crimson Viper, a brand new character, has previously been announced. SFIV's going to be playable at the AOU show in Japan on February 15, so expect a load more info then.