The ball crossed the goal line while Roethlisberger was in the air. Where it landed has no bearing on whether it was a touchdown or not, so the photo is irrelevant.
I've also seen "proof" that it was not a TD posted by folks who don't seem to realize that the ball only has to break the plane of the FRONT of the goal line, it doesn't have to pass through the other side of it.
IMO it was a TD, but the call was close enough to have been HONESTLY and FAIRLY called either way on the field. Given that there was no indisputable evidence to overturn the call, the officiating in this instance was absolutely correct.
I know. I also posted the picture in 166 of Ben in the air which supposively shows his furtherest forward progress. It does not show the ball breaking the plane of the endzone, but you can't tell for certain. But you are correct, that call could have been made either way and no one can bitch. It was well within the error that any human being could have made.