Finnish Complaints Choir 
In short, Complaints Choir is a community art project that allows people to sing about their complaints along with other complainers. There are a number of such choirs around the world, but I found this particular choir from Helsinki the most amusing, especially the bit about the number 3 tram line smelling of pee. It all seems like a rather good idea :)
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I wrote a Referat on this subject for my German Oral class last week. It was good. The Hamburg 'Beschwerdechor' isn't bad either..
Well, Peter, I hope you mentioned my blog in there!