EDIT 10/1/10
Here is the Contest Thread! Go there for full contest details including the two contest themes: The Reveal and Aperture Science.

Here is a look at the prizes:

1st Place Prize – Portal 2 Logo T-shirt, a $50 Steam gift, and Portal 2 pre-order as soon as Portal 2 is available for purchase!

2nd Place Prize – Choice of Blue Robot or Orange Robot Co-op T-shirt, and a $20 Steam gift!

3rd Place Prize – Choice of Blue Robot or Orange Robot Co-op T-shirt, and a $10 Steam gift!

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