Billing itself as "the Web's premier source of volcano info," this site, maintained by the University of North Dakota with NASA support, has volcano news and info, a Volcano of the Week page, pictures, movies, games, an Ask a Volcanologist section, a searchable Today in Volcano History feature, and links to other sites.
Highlights include satellite images showing the world's ten most active volcanoes; information about current global volcanic activity, research in remote sensing of volcanoes, hazards, and "Decade Volcanoes"; links to government agencies and research institutions; and "volcanic humor."
A handsome photo-essay on the Soufriere Hills crater that suddenly reawakened in 1995, after centuries of dormancy, and has now tormented the Caribbean island of Montserrat for almost three years. Good background information on volcanoes.
