For some incredible pictures shot from the top of the cranes building the core of the Shanghai Tower, have a look at this, or this. These shots are pretty nice, too.
The tallest man-made structure in China? That title's still held by Guangzhou's Canton Tower. But that's a tower, not a building. There are rules about these things, goddamnit.
The Shanghai Tower (which is a building, not a tower) is due to be completed in 2014, at a height of 632 meters, which will make it the second-tallest building in the world, after the Burj Khalifa in Dubai (828.8m), beating this chunky mother in Mecca, too.