According to shizowa san over at the official Street Fighter Dev blog, next Friday, April 17th, will mark the anouncement of something regarding SF4.
According to a translation from adriasang.com: " The blog states that April 17 will offer notice about the time frame of something. The something is one of two things that people should apparently know about. It may even be both the things!"
So what could it be? i think it is quite obvious that she means the Championship patch and the Pc version of the game.
I guess we will know by next week.