Tutorials
No tutorials here yet. You can check out the one I wrote a long time ago about event handling in NS4 and NS6 in this JavascriptKit article, but it was poorly written and edited a little bit too much for my liking.
There should be some stuff here at some time or another pertaining to writing good XHTML pages, DOM scripting, and maybe some SVG tidbits. Until then though, you're going to have to wait.