We review the status of several phenomenological topics of current interest
in neutrino oscillations: (i) Solar neutrino oscillations after the first
Sudbury Neutrino Observatory measurements, including both model-independent and
model-dependent results; (ii) Dominant nu_mu-->nu_tau oscillations of
atmospheric and K2K neutrinos, and possible subdominant oscillations induced by
either extra states or extra interactions; and (iii) Four-neutrino scenarios
embedding the controversial LSND evidence for oscillations.Comment: 9 pages, including 12 figures. Presented at TAUP 2001: Topics in
Astroparticle and Underground Physics, Assergi, Italy, 8-12 Sep. 200