While not as small as a point and shoot, some of the mirror less cameras are pretty compact, as are some of the zoom lenses available for them. Both Panasonic and Olympus use the m4/3 format and have a pretty wide variety of lens options. The m4/3 has a 2:1 crop factor so if you traveled with a 14-42 zoom that would give you the equivalent of a 28-84 on a full frame 35mm sensor. They also can shoot some pretty impressive HD video.