it's called "Bros" by Panda Bear. you can hear a short cut of it on Panda Bear's myspace page (the album version is 12:30). it's like Beach Boys + Pulp + boring, but not actually boring. Panda Bear is one of the guys from Animal Collective, which might give other people more context than it gives me.
Aside: everything indie since the Arcade Fire's Funeral that's not atonal (Decemberists/Mountain Goats style) is Pulp-influenced, in my head.