And for anyone starting from the beginning, here is the index. I notice it's fallen behind - the posts are up to #19 while the index has links up to 11.

Following links from Luke's posts is probably a better way to read Eliezer's posts than the Sequences page on the LW wiki is, because of the summaries, and because many of the best articles are one-offs that didn't fit into the "sequences" classification. (Though it does have the disadvantage of not including other authors, some of whom do feature on the Sequences page. Luke, perhaps when Reading Yudkowsky starts nearing the end, you'll continue with Reading Yvain Et Al?)