Today I was looking for some information for users on "Getting Started with WSS" (this is for the non-profit that I set up a SharePoint site for) and I ran across Lamont Harrington's blog.  There are some really great resources here, I don't know how I missed it previously!  One of the most useful posts (although I haven't read them all) is a fabulous list of SharePoint resources including:

It's a great list of resources, and it looks like he even keeps it up to date!