Going on with its pre-PMA expo camera launches, Canon tonight has kicked off the launch of four compacts in its staple PowerShot SD line. The SD970 IS represents the summit with a 12-megapixel sensor and a 5X lens. It gets the full round of features for compact cameras using the DIGIC 4 engine, including 720p HD video with HDMI output, full scene recognition, blink and face detection, shake-base
