link-z

laacz.lv points to a presentation about the architecture of Flickr (written in PHP)
http://laacz.lv/blog/2004/10/27/scaling_php

i tried to find some links about the architecture of Orkut, but did not find much. here's what I did find:

http://styrheim.weblogg.no/180404115522_orkut__evaluation.html
Styrheim - Orkut - Evaluation

http://www.lifewithalacrity.com/2004/08/intimacy_gradie.html
Life With Alacrity: Intimacy Gradient and Other Lessons from Architecture

http://www.lifewithalacrity.com/2004/04/four_kinds_of_p.html
http://www.lifewithalacrity.com/2004/08/progressive_tru.html