The study of single-top-quark production has required the development
of new insights into every aspect of QCD: from the composition of the
proton, to the subtle nature of inclusive versus exclusive
measurements, to a general reinterpretation of the connection between
theoretical calculations and experimental observables.  After a brief
review of why t-channel single top plays the modern role of deep
inelastic scattering in physics at hadron colliders, I will explain
how s-channel single top plays the role of a new Drell Yan.  In
particular, I will describe recent model-independent searches for new
charged vector currents (W-prime bosons) and their implications for
theory and experiment.