Interpol played a live session on BBC 6 Music this morning. If you missed it, listen to it on the BBC iPlayer (only available for the next 7 days). The Interpol interview and session starts at 1:38:20. They have also posted some videos, but they are only available to those in the UK. So watch them on YouTube - Summer Well, Lights, Barricade.
Update: Download the audio here. (Thanks Hazey Jane)