Previously I reviewed the website of Chinesepod which offers some great podcasts and tools to learn Chinese. In my quest to find more sources for learning Chinese (more fun than actually learning it myself:) I recently found a new site that uses the podcast format for Mandarin learners.
The Chinese podcasts of Serge Melnyk are a nice addition. Weekly new free Chinese lessons are posted and they seem to be aimed at the beginner. You have to pay to get the transcripts and worksheets.