If an exploit is found for the i4, would it possible to use the same exploit for the 3GS (with the new bootrom)? I guess the dev-team will focus on the i4 now instead of the 3GS, but I'm hoping that if they are able to jb the i4, that they also will be able to the same for the 3GS. But I guess they will wait for Apple to release 4.0.1 first before releasing any jb at all.