The Antarctic Multibeam Bathymetry and Geophysical Data Synthesis (AMBS) is a web-accessible data resource for marine geoscience research within the Southern Ocean. The primary focus is to preserve and provide public access to multibeam seabed bathymetry acquired during expeditions of research vessels supported by the U.S. National Science Foundation. Since inception in 2003, our primary goal has been to facilitate specialist and non-specialist visualization and exploration of the sub-sea landscape to the full detail of the original data. Uniform visualization across a wide-range of map scales at high latitudes is made possible by dynamic access to a gridded synthesis in both Polar and Mercator projections. A second goal is to support multi-disciplinary research needs by offering data discovery and visualization of numerous complementary geoscience datasets. In this report, we describe the design objectives and architecture of the AMBS, and recent developments regarding data submission and delivery via Web Services.