Single top quark production at the Tevatron
  The Tevatron experiments D0 and CDF have found evidence for single top quark production, based on datasets between 0.9fb-1 and 2.2fb^-1. Several different multivariate techniques are used to extract the single top quark signal out of the large backgrounds. The cross section measurements are also used to provide the first direct measurement of the CKM matrix element |Vtb|. 
Reinhard Schwienhorst (for the D0 and CDF collaborations)