The Operator Product Expansion for Wilson Loops and Surfaces in the   Large N Limit
  The operator product expansion for ``small'' Wilson loops in {\cal N}=4, d=4 SYM is studied. The OPE coefficients are calculated in the large N and g_{YM}^2 N limit by exploiting the AdS/CFT correspondence. We also consider Wilson surfaces in the (0,2), d=6 superconformal theory. In this case, we find that the UV divergent terms include a term proportional to the rigid string action. 
David Berenstein, Richard Corrado, Willy Fischler (UT Austin), and   Juan Maldacena (Harvard U.)