Real World Web: Performance & Scalability
Awesome (and very long) slideshow on all sorts of scalability and performance techniques for massive websites/services.
Beyond REST? Building data services with XMPP
Interesting presentation looking at XMPP and how to use it to build web services.
High Scalability | Building bigger, faster, more reliable websites.
Great site with all sorts of info, reviews and analyses on scalable architectures etc.