Canon has been a major force in the pocket camera world, and the Canon S100 released last fall has been the undisputed king. But with the new Nikon P310 now shipping, Nikon tries to knock the S100 off its throne. Not to be outdone, competition from the Panasonic LX-5, the Olympus XZ-1, and the Samsung TL500 makes for a fascinating shootout that has just been posted.more