As I'm sure many of you are aware, Portal 2 came out just a couple of weeks ago. (PS--it was awesome). Check out these posters made by flickr user wd.farmer that capture the 50's style feeling of the game.
By the way, I love repulsion gel. I love all the gels, actually. I hope that when the Portal 2 DLC is released (and if PSN ever goes back online) that it will deal with all of the different gels. They were so much fun.
If these were available in poster sizes I would probably buy the whole rainbow. Definitely check out the rest of the posters, they are awesome. I can hear Cave Johnson's voice in my head as I read all of these.