The InterRidge Hydrothermal Vents Database current, live version 3.4 is available at: http://vents-data.interridge.org
The previous version 3.3 kml file for Google Earth is available here.
The older version 2.1 is available through GeoMapApp and as Supplementary Data in: Beaulieu, S. E., E. T. Baker, C. R. German, and A. Maffei (2013), An authoritative global database for active submarine hydrothermal vent fields, Geochem. Geophys. Geosys., 14, 4892–4905, doi:10.1002/2013GC004998.
