A single basin works well in a small kitchen or as a secondary prep sink.
The double-basin sink has long been the standard. Configurations with one large and one small bowl -- or one deep bowl and one shallow bowl -- are now common.
The three-basin sink is great -- if you have the space. Two large basins often flank one small, shallow bowl. Sink manufacturers usually offer accessories, such as colanders and cutting boards, that fit into the shallow basin.