At Enigma.io, we created this dashboard/data graphic showing who is affected by the current gov't shutdown[0]. It's been a really effective way to get our name out there a bit and show off the kind of work we can do with our data :)

[0] http://labs.enigma.io/shutdown2013

at TOMODO.com, few months ago when Jeff Bezos bought The Washington Post we have created Mod that called "The Amazon Post" (amazonpost.tomodo.me), ppl laughed and shared the Mod all over the web.