Jeff Heer, Scott Murray and myself have done a d3 tutorial at visWeek 2012. You probably gathered that from the title of the post.
Here is a link to all the slides and code examples that we have presented:
For the purpose of the tutorial I have compiled a d3 cheat sheet, on 4 pages it groups some of the most common d3 functions. When I was learning d3 my number one problem was figuring out which property should be set using .attr, and which required .style. And also: which svg element support which property? All of this is addressed in the cheat sheet. It’s part of the link above, but if you want it directly without downloading a 13Mb file, here it is:
d3 cheat sheet