Competition and use of black hat techniques by someone (nothing proved yet so no blame game) but the fact is Blu-Ray website was hacked and it was re-directing to HD DVD site.
Tech2 news suggests:
The war between Blu-Ray and HD DVD has been carrying on in full swing this entire year. There have been a lot of charges traded and numbers proclaimed, about who is winning the format war. Carrying the war to the next level, an HD DVD enthusiast hacked the Blu-Ray website and re-directed it to the HD DVD website.