The focal length of the FZ28 is 27-486mm (f/2.8-4.4) as opposed to 28-504mm on the FZ18.
720p HD video at 30fps with zoom and sound during capture.
Venus IV engine and expanded intelligent Auto settings.
Intelligent Exposure, which we first saw in the Panasonic Lumix DMC-TZ5 which can adjust the ISO in different sections of the frame for optimal exposure.
HDMI output with optional cable.
Improved face detection, focus tracking, and a 13 fps 3mp burst mode.
Expanded intelligent Auto controls that do serious justice to the oft-derided phrase "point and shoot."