Journal qohen's Journal: Memcached Links (inc. the rant about proper usage, etc.)
Proper (and Improper) Usage of Memcached
http://joped.com/2009/03/a-rant-about-proper-memcache-usage/
While the above says don't use memcached for sessions, others have other ideas--are they wrong?
http://phpslacker.com/2009/03/02/php-session-clustering-with-memcache/
http://highscalability.com/strategy-how-manage-sessions-using-memcached
http://www.softwareprojects.com/resources/programming/t-memcached-for-php-sessions-1654.html
This might be what's needed if you want to do sessions, etc. w/memcached--patches for memcached which add replication:
http://repcached.lab.klab.org/
Some other memcached links:
http://terrychay.com/blog/article/keeping-memcache-consistent.shtml
http://code.google.com/p/memcached/wiki/FAQ#How_does_memcached_handle_failover?
Memcached and MySQL:
http://highscalability.com/bunch-great-strategies-using-memcached-and-mysql-better-together
http://tangent.org/586/Memcached_Functions_for_MySQL.html