National Geographic has announced that they will be joining the ranks of those who are now Blu-ray exclusive. This is certainly no surprise that National Geographic would make this decision as they are a subdivision of Warner. It does however continue the sad march to the dead pool for HD DVD. Of the Warner subsidiaries only BBC continues to holdout for non-exclusivity. The first title to be released as a Blu-ray exclusive will be the April release of Sharkwater which should get an official announcement in the next few weeks.