Currently, Bill Zebub hosts a radio show on Tuesday evenings from Midnight-3AM (technically Wednesday mornings) as Professor Dumdum on 91.1 FM, 91.9 FM (in Mnahatten) and streamed worldwide (NY time) at wf,u.org.

You can enjoy streaming most of his shows at any time, or downloading them if you wish. Here is the link to get you to his list of shows. The site has a popup player but you can also download.
http://www.wfmu.org/playlists/DL

Bill Zebub has also hosted shows as himself on THE VORTEX OF CHAOS, which you can also find at that site.