I've been told Canon will announce TWO new G series Powershots at Photokina.
One will be like the current model with a faster lens and some added megapixels. The 2nd one will have a new larger CMOS sensor and the best ISO performance of any zoom point & shoot. The jury is still out if it will match the DP1 or not. Both cameras will also go wider than 35mm. They will keep the same 6X zoom.