Hallelujah Chorus from Handel's Messiah

Cantillation with the Orchestra of the Antipodes, conducted by Antony Walker (thanks to Buck for the coding). The Robert Shaw version is also quite nice, and Steve Audio passed on this great version by the Roches:

The Flaming Lips - "Do You Realize??"

School of Seven Bells – "Half Asleep"

Odetta

Here's three selections in two videos. For the first video, from 1969, "the first song she performs is based on a Negro "field blues" song known simply as "Black Woman," then [she] duets with Cash on "Shame And Scandal In The Family," which was written by a calypso artist who went by Sir Lancelot, in the 40s." The second video is a live version of Odetta performing "House of the Rising Sun" from 2005.

Meanwhile, here's the Washington Post and NPR obituaries, a 20 minute New York Times video interview (via Paul at Impolitic Eye) and a clip of a radio interview.