I carried a Canon PowerShot G11 for years when I my SLR was too big, and while not pocket-size, the G series provide a great compromise between size and image quality.
Canon PowerShot G15
The specs of the new Canon PowerShot G15 include a 12.1 MP sensor, 5x Wide-Angle Optical Image Stabilized Zoom, and the multiple exposure modes that keeps many of us coming back to the G-series.