You Sony-fanboys actually believe in this rumour? Well, of course you wish it would happen, because it would make Sony look like winners putting Blue-ray in the PS3 and make MS look like copy-cats.
But Blue-ray at this point in time is youthless in a console. There aren't even enuff movies released. MS knows this.
An add-on Blue-ray player for the niche market that want to purchase the few blockbuster movies I can understand, but not built in into an X360.