http://codex.wordpress.org/

I'm learning it too. I bought a book about Wordpress but found the official documentation here much more useful and to the point.

This: Rockstar Wordpress Designer

rockstar wordpress is great.
http://digwp.com/ thats good. from the ppl that run nettuts.com too so theres tips there as well.
use the codex when you need to look up a tag to do something specific with some examples. Will be confusing at first if you dont know PHP but you'll start catching on.

http://css-tricks.com/video-screencasts/25-designing-for-wordpress-part-one/

lost of wordpress stuff on css-tricks along with forums with people that will help out. search first though.

lynda.com also has a series on WP now i believe.

WP is great, i use it regularly. Actually working on another site with it today. Virtually anything you can think of to do with WP has been done and there's likely a plugin somewhere that adds any features you could want. Even shopping cart type stuff but the free ones were a little lacking for my taste so I'm going with something else.

I just had a phone call for a job that is based heavily on Wordpress. weird.

the Envato people just launched a new Wordpress dedicated site. Figured I'd post it here.

http://wp.tutsplus.com/

Ah man, this has been great! Thanks for all the awesome links.

I'll be sure to post my site when I get something decent put together.

Wordpress is tricky as hell, especailly when you own your domain, so check out Wordpress.org when you run into trouble