I love acapella! I think it is nerdy awesomeness lol. If there was only one thing that I could complain about it is that the style tends to really only limit itself to one type of music. The songs tend to be cheerful or poppy (or maybe just the ones I have heard). This is NOT.
The dude on the top left is pure gold! Now, I am thinking of other songs I wish these guys could do. And the more I think about it, the more I wish they did an AMV acapella style... Or is that just not right? lol