I believe you can listen live online. I'm not sure if you have to reside in the States for this feature to work (I know I can't watch Dr. Who episodes from the official web site because I don't live in the UK). If this happens to be the case, there will be a podcast of the interview after the broadcast: http://www.wgnradio.com/shows/ext720/.
Friday, February 19, 2010
Accessed February 19, 2010 | Oriental Institute - Facebook | Dr. Emily Teeter and friends will be talking about the new exhibit at the Oriental Institute called Pioneers of the Past from 9 - 11pm CT on WGN Radio AM 720 today (Friday, February 19, 2010). They will take callers' questions starting at 10pm.