There are a handful of podcasts out there - but you need to sift through them to find the ones that are discussing the topics at the level that you're interested in (end-user vs. developer vs. administrator, etc.)
Since SharePoint is part of the Office family, don't forget to check out the Office resource sites like this one:
http://office.microsoft.com/en-us/training/default.aspx
That's great from more of an end-user perspective. More the "How to add documents to Document Libraries" types of instructions rather than "How to create a new SharePoint Site Collection."
I haven't been there in a while, but I spent a fair amount of time poking around that site for ideas on my team's "SharePoint Tip of the Week" docs I send out (and by "send out" I mean post to our portal's Document Center and send everyone links to view as they have time). I find something simple like "how to add your team's SharePoint calendar to Outlook" and type up the step-by-step instructions with screenshots. I try to keep it 1-2 pages depending on the content. I also setup a Discussion Board with a thread for each Tip, a summary, a link to the Tip, etc. so people can add comments and questions.
One last thing - check this place out:
http://www.customguide.com/quick_references.htm
They have "Quick References" for a LOT of applications/platforms. A great little resource to hand out to people if you just upgraded to Office 2007 or similar situation. Just be aware that they'll follow-up with you trying to sell you their training.
