For the dentists in the crowd, the ADA (American Dental Association) has a nice series of podcast available at their site. Topics include: "Internet Marketing","Finding and Keeping the Patient", as well as Strategic Planning and Tax Management.
They also have a podcast RSS feed. You can get the podcasts, and more details here: ADA Podcasts
Hans Skariah, B.Sc., DMD
Promenade Court Dental Health Group
2233 Hurontario St., Mississauga, ON, Canada (in the Dome Building)