The Web Experience Toolkit distribution of Drupal (aka WxT-Drupal, wetkit, or wet-boew) is a version of Drupal designed for organizations with a bilingual and accessibility requirements.
I can confidently say that this book will teach you a lot about nginx, both as tutorial and reference. It's now mandatory reading for anyone on our team who will ever touch an nginx config file.
Drupal Global Training Days are a recent initiative in the Drupal community, created this year by the Drupal Association to help spread Drupal adoption.
There will be a hive of activity around multilingual Drupal at DrupalCon Munich 2012! Whether you're new to multilingual Drupal or a developer wanting to change how Drupal works with language, there are lots of opportunities to get involved.