The KEK B-meson factory, BELLE recently put out some
interesting results, having observed 17 B-meson decays
into tau lepton and its neutrino, from a sample of,
yes, 450 million B-meson pairs! In the decays, the
B-mesons turn into a final state with only leptons,
with missing energy carried away by several neutrinos.
The number is in accordance with the standard model
expectations and tightly constrains the parameter space
for charged Higgs. Details can be found here.