According to Larry Hryb's Major Nelson blog, the 320GB Xbox 360 hard drive is now available, and will come with an Xbox Live download code for LEGO Star Wars III: The Clone Wars.
The hard drive comes with a disclaimer, however, "The Media Hard Drive is compatible with all Xbox 360 S models and will be sold at your favorite Xbox 360 retailer and is available worldwide, the Media Hard Drive will not include the game download code in Japan, Saudi Arabia, Slovakia and the UAE." So, the drive is incompatible with the classic 360.
The 320GB hard drive will be released later this month and will cost $129.99 USD.
320GB Xbox 360 hard drive now available
11 October 2011 | By JonahFalcon