Doesn't help that their own website is barely Web 1.0. It's damned near impossible to find anything in their documentation unless you've already memorized all the hoops you need to jump through.
asktom.oracle.com is something of a gem within that site. The navigation isn't great but there's a lot of good "how to" questions and answers there. I found it very helpful when I was working with Oracle. Also I recommend Tom Kyte's books. He's definitely an Oracle evangelist, but he knows what he's talking about.
