Most of the National Public Radio stations have fundraisers which make use of volunteers who answer phones and process credit cards. WBUR in Boston has a thing where for every 10 man-hours a group volunteers, they get an on-air shout-out.
Five slam poets answering phones would get a shout-out every two hours. It does three things:
1. It's a nice thing to do.
2. It gets publicity for the slam.
3. It gives NPR reporters ideas for stories about poetry slam. Ahem.