The top quark appears to complete the spectrum of fundamental fermions required to explain the properties of the electroweak interaction.  However, its peculiar mass sets it apart from the other quarks and leptons.  The study of this unique and still new particle is a major thrust of the recently started run at the Fermilab Tevatron.  Measurement of the top production cross section serves as a test of perturbative calculations of the strong interaction. The mass of the top provides a sensitive window on the mechanism underlying the generation of fundamental particle mass. The measurement of these, and other, quantities will be greatly improved in the current run. I will present the most recent D0 measurement of the production cross section for top-antitop pairs in proton-antiproton collisions. Progress in extracting a top mass measurement from events with two leptons will also be discussed.