For more than 40 years, regular worldwide conferences oil ash and corrosion research have been held, in the beginning, within the framework of the United Engineering Foundation (UEF). The first conference was held in Marchwood, just outside Southampton in the UK in 1963, the next is coming tip in Banff, Canada, in Autumn 2008. At the UEF ash conference in Palm Coast, FL, 1991, the late Dr. Richard Bryers provided in excellent Outline of trends in ash research presented at these conferences in the period 1963-1991. Since 1991, ash conferences have been held in Solihull, UK, 1993; Waterville Valley, NH, 1995 Kona, HA, 1997: Park City, UT, 2000; and Snowbird, UT. 2001 and again in 2006. At the 1995 Waterville conference. the first papers oil biomass-related ash research were provided. Since then, several aspects of utilization of biomass in power boilers have been addressed. It started out with pioneering release studies of alkali metals from biomass and a significant number of characterization as well as modeling studies. Later, a number of advanced analytical techniques, Lis well as detailed studies of deposition in all scales from the laboratory to full-scale, has been presented. This paper provides an outline of the trends in the papers presented, since the review by Bryers in 1991, and provides ideas oil the direction of the research within this forum in the years to come.