While Drupal improves its multilingual features with every version and there were numerous improvements with Drupal 6 and 7 especially, there are still lots of things for which contributed modules are needed, and multilingual support is not consistent (neither in some cases usable) with these modules. There is sizable customization and glue-code building required.
Karsten Frohwein thought to take these problems and organize a group of contributors to take a deep look at them, conceptualize on better solutions and do actual implementation in a concentrated environment. Thankfully, as with great ideas, he got lots of support from companies and individuals interested, so the Internationalization SprintCamp is a go between the 11th and 15th of May 2011 in Berlin. Key contributors are being confirmed one by one, so this event is promising to be a great and high energy one for improving multilingual features and fixing bugs. There is place for up to 20 people, so we are looking for developers who can join and help. Contact Karsten through the Impressum page or leave a comment here with your contact information (such as drupal.org username or user URL).
The sprint is sponsored by the German Drupal-Initiative e. V., Comm-press, undpaul Drupal Development, Acquia and others. We are planning to do couch-surfing to reduce costs and increase fun. If you'd like to help sponsor, contact Karsten.
Ps. we will hang around in the #drupal-i18n IRC channel throughout the sprint, and distribute information and guidance for anybody who'd like to join and help virtually. See http://drupal.org/irc for more information on Drupal's IRC channels.