The group performing at the HOP was Sonic/Mafia, which featured two members from the popular group Wilco. Their music and style was rather unusual-- they played a multitude of percussion instruments-- set to the backdrop of either a painter or moving images.
It was quite interesting; at points, Benji (my friend) and I didn't know what to think. We were simply overwhelmed by the sheer creativity of the artists.
Check out them out at: http://hop.dartmouth.edu/performances/sonicvision