  We present results for the total top-pair production cross section at the
Tevatron and the LHC. Our predictions supplement fixed-order results with
resummation of soft logarithms and Coulomb singularities to
next-to-next-to-leading (NNLL) logarithmic accuracy and include top-antitop
bound-state effects. The effects of resummation, the dependence on the PDF set
used, the residual sources of theoretical uncertainty and their implication for
measurements of the top-quark mass are discussed.
