Several readers wrote to tell us about one of the next major projects to enter the Google-verse. We already have pretty views of the Earth and the Sky, the next target is apparently a 3D map of the oceans. "The tool — for now called Google Ocean, the sources say, though that name could change — is expected to be similar to other 3D online mapping applications. People will be able to see the underwater topography, called bathymetry; search for particular spots or attractions; and navigate through the digital environment by zooming and panning. (The tool, however, is not to be confused with the 'Google Ocean' project by France-based Magic Instinct Software that uses Google Earth as a visualization tool for marine data.)"