I have both KOKC and KPWA up and running. The audio feed is connected to my dual band ham radio and there is no 'delay' feature, however, I was able to set up the primary vfo with a mute function which allows the primary vfo (KPWA) to mute the secondary vfo (KOKC) if both vfos are receiving a transmission. I have better reception with KPWA and it's my favorite local GA airport, which is why it's set as my primary vfo. In the near future, I plan to purchase a dedicated scanner for the feed.
You will need to search for 'KOKC' to hear this feed. Below is what you will hear:
KOKC Will Rogers World Airport
Tower: 119.350
OKE City Approach/Departure: 124.600
KPWA Wiley Post Airport
Tower: 126.900
NOTE: At the time of this post (1-23-2011), the KOKC feed is NOT on the liveatc website yet, as it is still under review by the admin. Please allow a few days for it to be published.