  Variational Monte Carlo and Green's function Monte Carlo are powerful tools
for calculations of properties of light nuclei using realistic two-nucleon and
three-nucleon potentials. Recently the GFMC method has been extended to
multiple states with the same quantum numbers. The combination of the Argonne
v_18 two-nucleon and Illinois-2 three-nucleon potentials gives a good
prediction of many energies of nuclei up to 12C. A number of other recent
results are presented: comparison of binding energies with those obtained by
the no-core shell model; the incompatibility of modern nuclear Hamiltonians
with a bound tetra-neutron; difficulties in computing RMS radii of very weakly
bound nuclei, such as 6He; center-of-mass effects on spectroscopic factors; and
the possible use of an artificial external well in calculations of neutron-rich
isotopes.
