Here you go...
The new top of the range Regza LCD HDTV from Toshiba is the Toshiba SV670 series. The SV670’s make great use of the new FocaLight LED backlight technology. The LED backlight with local dimming offers a full matrix of LEDs which can dim independently of each other to create a much higher dynamic contrast ratio for improved colors and image quality. Simple edge LED lighting does not offer this feature.
The Toshiba Regza SV series will be available in two large sizes, as the 46-inch Toshiba 46SV670U and as the 55-inch Toshiba 55SV670U, both models should be available in May 2009.
Found it here.... http://www.hdtvlounge.net/toshiba/regza-sv670/
Looks like the 670 and 645 are both LED, the 650 from what I saw is not.