A few IT sites have been reporting the existance of a storage feature pack.
The three main features available in the beta are as follows:
Active Storage Platform: This pre-release package enables Windows to restrict access to portable devices (such as a USB flash dongles) via a certificate or password authentication
Image Mastering API update for Blu-Ray media: This feature enables Windows to do master style optical burning on Blu-Ray media
Smart Card Driver: Provides support for new form factors, such as ICCD/CCID
To find out more go here:
Storage feature pack coming for Windows - The INQUIRER

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I recently heard about this on someother forums.. Thanks for sharing