Learning Drupal

I am working pretty hard these days to wrap my brain around all of the capabilities of drupal. And I am thoroughly impressed with the community-contributed modules that absolutely solve so many common issues for most web sites.
In particular, I am in love with views 2, pathauto, and the ability to write wacky php code in arguments of views to contextually manipulate information.  It took a long bit of research to figure that stuff out, but once you'ev got it, it is like riding a bike... you're not likely to soon forget how it works!