The Gamerscore Blog posted a series of photos on its Flickr account of Microsoft team members rehearsing for tonight's E3 2007 keynote, possibly inadvertently revealing what many believe to be an all-new, fourth Xbox 360 hardware release. With the Core, Premium and Elite models represented, the fourth could be at any place in the specification spectrum, either signaling a less expensive, more casually targeted unit or a more expensive, more feature rich unit. If I were a betting man, I'd put my money on the former as I wouldn't be surprised to see Microsoft be more aggressive in targeting a less hardcore crowd with a lower cost, possibly bundled box. We'll know more tonight, starting at 8:30 PM PDT.

Gamerscore Blog Photostream [Flickr via Joystiq]

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