  We present an updated version of the FEWZ (Fully Exclusive W and Z
production) code for the calculation of W and gamma*/Z production at
next-to-next-to-leading order in the strong coupling. Several new features and
observables are introduced, and an order-of-magnitude speed improvement over
the performance of FEWZ 2.0 is demonstrated. New phenomenological results for W
production and comparisons with LHC data are presented, and used to illustrate
the range of physics studies possible with the features of FEWZ 2.1. We
demonstrate with an example the importance of directly comparing
fiducial-region measurements with theoretical predictions, rather than first
extrapolating them to the full phase space.
