As a designer I follow a lot of blogs, am active with agencies on Facebook, Twitter, Tumblr, and all the rest. I get newsletters and updates, and I curate my uber design spaces with my Springpad account. If I've learned one thing, the old phrase "Imitation is the sincerest form of flattery" prevails in the design world.
Don't get me wrong, there is an endless amount of design talent that has been shown online with portfolio sites like Dribbble, and Behance, as well as inspiration sites like Serial Thriller and FFFFound. Design sites dedicated to packaging, web sites, branding, magazines and posters.
But in my daily break and relaxation of cruising the 'net for my research and inspiration, the one thing that gets copied (parodied, is more like it) is the Keep Calm propaganda posters that were first designed in 1939 by the UK's Ministry of Information in preparation of their upcoming involvement in World War II. It is an interesting read for sure, and the most interesting thing is that they were never displayed publicly.
It wasn't 'rediscovered' until 2000. It was believed there were only two known surviving examples of the poster outside government archives until a collection of 15 originals was brought in to the Antiques Roadshow in 2012 by the daughter of an ex-Royal Observer Corpsmember.
Of course, I had to try my own hand reappropriating the design for my own needs and came up with this for reference to this site