One of greatest things about collective sites is the amount of cool works they got. ER.GE.BE is a Brazilian design collective studio and is the home of many designers.
They have done pieces for many major companies, such as MTV, Nike, Adidas, BMW, among many others. Their work consist mainly inspired in pop art, pop culture, rock, bright colors, lots of contrast, and teenage culture. They also have done a great site for a Christian ministry called SexxxChurch, a Christian Porn Site (in their own words). There is a version in portuguese and one for spanish speakers. Check all these and enjoy! Cheers! ;)