Okay someone on HCF.net found the link to get to the 1998 and 1999 archives. I got to go to sleep. Someone look to see if they can find more Obama files.
http://www.wbez.org/audio_library/od_ra1.asp
Are there any other Chicago public radio stations with archives, I remember looking through Google 2001 and finding a bunch of public television appearances by Obama, especially discussing the 2000 election and the aftermath, he also gave a speech at a University which I am now forgetting, something to the effect of The 2000 election through the eyes of Martin Luther King Jr.
Tried to access it but it was gone.