http://www.facebook.com/notes/facebook-engineering/real-world-web-application-benchmarking/203367363919 Facebook has build custom web-app testing framework to test server performance. Read it, especially the section on why “standard” SPECxxx benchmarks are not a good measure of anything. Also, ready about performance-per-watt, as this is really important for modern data centers.
http://multirbl.valli.org/lookup/ search multiple DNSNL
http://www.javaworld.com/javaworld/jw-12-2007/jw-12-appservers.html notes (mostly feature list) on open source java app servers
http://ask.slashdot.org/comments.pl?sid=1775372&cid=33459112 suggestions for for network media player setup from slahsdot
http://www.fcenter.ru/online.shtml?articles/hardware/processors/28696 low power AMD cpu, a candidate for a new home server project
http://zumastor.org/man/ddsnap.8.html a way to ‘sync’ block devices in ‘rsync’ style. Useful to implement backup of xen VMs based on LVM volumes. Also see http://serverfault.com/questions/27397/sync-lvm-snapshots-to-backup-server
http://blog.matt-darby.com/posts/697-apache-passenger-vs-nginx-mongrel comparing 2 popular ways to deploy ruby-on-rails app
http://blog.zhuzhaoyuan.com/category/c10k/ notes about high-performance unix server programming, things like concurrency models, IO types, memory allocation strategies, etc.
http://habrahabr.ru/blogs/perl/69411/#habracut some examples on how to write simple http server in Perl
http://xph.us/software/beanstalkd/ seems to a rare thing: a message queue server, running as a native code