The Volt's Heart
Along with photos and specs of the Volt, GM has released a few promo videos about different aspects of the plug-in hybrid car. The one above is about the battery (probably the single most important component of the Volt), and you can find 5 other videos on GM's site (about aerodynamism, design, etc).
But remember, third parties haven't had access to the production Volt yet, so the videos are promo, not review. They're interesting, but don't expect an unbiased look. Via GM