This is a Blender animation made by Avemagnadude from the blender community. http://www.youtube.com/watch?v=ww-jfygVEE0

I already have the appropriate tools for importing source models and animations, but I'd like to know if anyone can help me port source maps/levels into blender, like in the video.
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I crave braaaaaiiiiiins

The only way I know is to use the SourceSDK map editor Hammer, with the Propper tool to render maps (or pieces of them) as SMD. Then import those with the Source SMD Tools addon.

I used that technique to help a mapper with some custom models.
He sent a chunk of the map to me, so I could scale my model correctly to fit his room.