I'm assuming "ground zero" here also means "square one" :) Preliminary documentation and an example program for <boost/pending/indirect_cmp.hpp>, <boost/pending/mutable_queue.hpp>, and <boost/pending/fibonacci_heap.hpp> can be found at: <http://groups.yahoo.com/group/boost/files/pending/> Bugs: The mutable_queue constructor that takes InputIterator arguments is push()-ing each element twice, because the the internal vector c is first initialized with the elements, then each push() in the while loop adds each element into c again. The example program demonstrates this. The fibonacci_heap fails at the first assert() during pop(). More to come! Cromwell Enage __________________________________ Do you Yahoo!? Yahoo! Finance: Get your refund fast by filing online. http://taxes.yahoo.com/filing.html