Thanks to Kyle for pointing out the Tiny Desk Concert Series from NPR (back when I posted that 'Death' playlist).
I haven't been through all of the concerts (there are, admittedly, a lot of artists that I don't know), but I'm already enjoying these performances a whole bunch.
The Avett Brothers (not embeddable)
I really dig the lo-fi, acoustic ethos of just having the musicians roll in and play in the NPR offices.
And it makes me sad that we didn't get to the NPR tour when we were in DC last summer.