You can now manage all of your podcasts on Mediafly and sync them directly to your SanDisk mp3 player. The SanDisk integration is still in Beta but I would love to get your feedback. Here is a link to my blog post that descries how to get the Beta version.
Send me your thoughts at www.mediafly.com/contactus. I look forward to your input to make this a great solution for SanDisk users!
Carson V. Conant