Also called "The Bird's Nest," and you can see why.
I'm looking forward to watching a bit of the Olympics and I was interested in what the "Olympic Stadium" looks like in Beijing. This is where the Opening and Closing Ceremonies will take place, and other events such as Track and Field competitions.
Here it is:
Under construction, as seen from space.
More about the stadium here and here.
You can see other architectural renderings of the finalists in the worldwide competition for the design at this site.