Server Deployment of Economist.com As documented here, it seems the Economist is using Drupal for most of it's site.  I am just curious if anyone has information on the number of servers and their config.  Any idea?
They have 2 Varnish servers, 10 web servers and 4 database nodes (2 master, 2 slave)

Their workflow is Trunk -> Stage -> Live, from bzr.

They are fully Drupal for a month or so, now.

See The Economist: An Informal Technical Case Study session video from DrupalCon London for more information on their processes.