  The presentation at Strings 2000 was intended to be in two main parts, but
there was only time for part one. However both parts appeared on the online
proceedings, and are also included in this document. The first part concerns an
exploration of the connection between the physics of the `enhancon' geometry
arising from wrapping N D6-branes on the K3 manifold in Type IIA string theory
and that of a charge N BPS multi-monopole. This also relates to the physics of
2+1 dimensional SU(N) gauge theory with eight supercharges. The main results
uncovered by this exploration are: a) better insight into the non-perturbative
geometry of the enhancon; b) the structure of the moduli space geometry, and
its characterisation in terms of generalisations of an Atiyah-Hitchin-like
manifold; c) the use of Nahm data to describe aspects of the geometry, showing
that the enhancon locus itself has a description as a fuzzy sphere. Part two
discusses the addition of extra D2-branes into the geometry. Two probe
computations show the difference between the geometry as seen by D2-branes and
that seen by wrapped D6-branes, and the accompanying gauge theory
interpretations are discussed.
