I think it contains some interesting ideas, and dates reasonably well. I'm going to revisit some of these concepts as I think more about how to do capacity planning in the cloud.
Capacity Planning for Virtualized Datacenters - Sun Network 2003
Started in 2004. Covers anything I find interesting, like clouds, cars and strange complex music. Views expressed are my own and not those of my employers (currently AWS). See also @adrianco