The Duden Dictionary is the best known dictionary for the German language. For 125 years, Duden has been the operative authority of the German language.
This year, together with Trendbüro, they had an really innovative idea to create an new dictionary of modern language, at Szenesprachenwiki.de on which everyone can identify hip new jargon.
In a way, it works a bit like TrendHunter.com in that, after spotting and posting a trend, their editors decide which make the cut and then publish them accordingly.
Check out their mention of Trend Hunter!