The Project Management Bookstore has a series of free webinars. To view the schedule, visit: http://www.projectmanagementbookstore.com/webinars/author-webinar-series.html
The Project Management Podcast. Earn free PDUs for listening to podcast. You don’t have to have an iPod to enjoy the service.
PM411 - PM411.org has podcast available for listening. Self-directed learning on Project Management, earn 1 PDU per one hour up to 15 PDUs in a three year cycle.
Disclaimer: This is not intended to be an endorsement of any of these providers.