  This "Mathematical Entertainments" column from the Intelligencer is an
exposition of current investigations, rooted in recent work of Jim Propp, into
"quasirandom" analogues of random walk and random aggregation processes.
Featured are the "Goldbugs" and the "Rotor-router". These are deterministic
processes which simulate the random ones, for example having the same limiting
states, but with faster convergence.
  The paper includes three large illustrations, which appear twice in the
submission, as both raster image (.png) and postscript (.eps) files. The latter
are much larger but needed for latex inclusion; the former are smaller, used by
pdflatex, and better for pixel-level viewing.
