I give an introduction to the effective field theory description of top pair
production at threshold in e+e- annihilation. The impact of the summation of
logarithms of the top quark velocity including most recent results at
next-to-next-to-leading logarithmic order is discussed.Comment: 19 pages, appolb_mod.cls, 4 postscript figures. Invited plenary talk
at Cracow Epiphany Conference on Heavy Flavors, January 3-6, 200