Debra is probably my favorite podcaster. But Chris Flisher has a decent podcast
http://www.chrisflisher.com/
and I've recently started to listen Marguerite Manning. She's pretty interesting if your interested in Karmic Astrology. But she's only in every other week.
http://www.margueritemanning.com/air.htm.
This link for Manning is not the same stuff she has on Itunes, this is must extra stuff. On Itunes she covers the different planets and what they mean karmically.