Is there a way to import Earth models into Sketchup?

[SiscoRevolution]

I am designing a building over a lot in San Francisco. The block it is being design on has many 3d gray buildings that I would like in my sketchup model to give me scale and something to present and compare to. Can I download a set of buildings or a small city block into sketchup?

[Ecuadorian]

[flash=853,505:3s42nzjh]http://www.youtube.com/v/6uvkw3wUiYk&fs=1[/flash:3s42nzjh]

[Gaieus]

Unfortunately only 3D Warehouse models can be easily brought in with the new context feature. Most of those grey buildings have been submitted by city councils and other bodies in other ways.

[SiscoRevolution]

Thanks for the post, its basically what I need but it doesn't show the low detail gray models like Gaieus states