The Plain English Campaign strives for better understanding through... well, to put it simply (and just the way they want it) -- plain English.  
The group is a watchdog for obfuscation, runaround, and gobbledygook from politicians, the media, and other public figures.  
Of special note on their site is the 'Annual Awards' link -- the 2003 Foot in Mouth award was just given to US Secretary of Defense Donald Rumsfeld for a rambling, incoherent, babbling comment he made about what we know, and what we don't know, and what we know we know, and what we know we don't know, and... oh, look, just go see for yourself. I'm getting a headache just thinking about it.