So... a couple of years back I went to see Joanna Newsom at the Albert Hall where she was supported by the Moore Brothers. Out they strolled and immediately filled the space with an amazing song involving nothing but their own two voices. I was quite impressed, but my wife was blown away... So the question is: can anyone recommend some good groups/albums that involve only acapella. I'm looking for something modern here, preferably bands that are still operating today... I won't take it personally if this thread gets no responses.