There's a land that I heard of once in a lullaby

I was watching the end of Scrubs this evening and you know the bit at the end where JD gives some meaningful message? Well this song was playing over it (see here), covered by Ted's Barbershop Quartet. Lovely, although don't listen to it too much or you will get a little depressed. The artist is Israel Kamakawiwo'ole....he's dead now.