Recently released their second LP, very different from their first, more accessible yet just as good. They're currently on a tour that was scheduled prior to the release of their new album, and by the number of shows selling out it's pretty clear they're gonna need much bigger venues for their next round. This is their best music vid IMO, but quite NSFW --
http://pitchfork.com/tv/#/musicvideo/3918-yeasayer-amblin-alp-we-are-free-secretly-canadian -- but to really appreciate 'em check out their La Blogotheque take-away show (google it).