Mike Merrill (kmikeym) organized this Nintendo DS party at his workplace, Panic Software (makers of lots of cool Mac apps).
From what I understand, everyone was upgrading to a DS Lite, so they were donating their old DS machines to a childrens' hospital.
anja and I don't own a DS, but there were plenty to go around. The music is coming from a game called Band Brothers that lets you jam with 8 people. It's kind of like Dance Dance Revolution in the way you play it, but it's much more fun, even though it's impossible to sound really good.