  To get an overall picture of the state of research in the area of fault-tolerance in message passing distributed systems, have a look at "<a href="ftp://ftp.db.toronto.edu/pub/vassos/fault.tolerant.broadcasts.ps.Z">A Modular Approach to Fault-Tolerant Broadcasts and Related Problems</a>" by <a href="http://www.cdf.toronto.edu:/DCS/CSRI/Hadzilacos.html">Vassos Hadzilacos</a> and <a href="http://www.cs.cornell.edu/Info/People/sam/sam.html">Sam Toueg</a>.  <h3>
