Any hints on earning a little through photography while touring? Has anyone done this?

Also, how important is sensor size here? Do magazines (or other potential clients) have a preference for images that come from larger sensors? How often would one be seriously disadvantaged with images from a compact camera having a smaller sensor (1/2.5" or 1/1.7")? Is micro 4/3 large enough, or might there be some preference at time for larger (APS-C or larger) sensors?