  We present a progress report on studying S-duality in lattice N=4 super
Yang-Mills. This is being done through a computation of 1/2-BPS states on the
Coulomb branch, especially the 't Hooft--Polyakov monopole and the W boson. Key
to these calculations is the use of twisted and C-periodic boundary conditions.
In addition we describe a variational method to disentangle operators with
definite scaling dimension, particularly the Konishi and supergravity
operators.
