First observation of single-top-quark production in the s channel is
reported. The result is based on the combination of the CDF and D0 measurements
of the cross section in proton-antiproton collisions at a center-of-mass energy
of 1.96 TeV. A summary of other recent single-top-quark results are also
included.Comment: Submitted to proceedings of Les Rencontres de Physique de la Vall\'ee
d'Aoste. (v2 corrects several typos
