Everything you wanted to know about Hawaii's volcanoes, from what's going on with the current eruptions to where the next eruption is likely to be, is now available on the Hawaiian Volcano Observatory's new web site, http://hvo.wr.usgs.gov.
The site is divided into areas of information about Kilauea (the currently erupting volcano), Mauna Loa (which last erupted in 1984), and Hawaii's other volcanoes (including Lo'ihi, the submerged volcano off the coast of the Big Island). Each site has photos, maps, eruption summaries, and historical information.