I must admit this has flown under my radar till now, but looks like pentax are finally coming good with a 645D.
The new Step Zoom option, zoom range can be set to 24mm, 28mm, 35mm, 70mm or 90mm
Panasonic itself claims that the new sensor is noiseless at ISO 800 which (if true) is a very good news considering that the sensor has a much higher pixel density than current MicroFourThirds sensor. Panasonic also said that the LX5 sensor has a better sensivity (by 31%) and saturation (38%) and greater dynamic range compared to the older Panasonic LX3