The Table of Contents for Current Developments in Mathematics, 2010 (link) lists:

• The Arf-Kervaire problem in algebraic topology: Sketch of the proof by Michael A. Hill, Michael J. Hopkins, and Douglas C. Ravenel
• On the Friedlander-Milnor conjecture for groups of small rank by Fabien Morel
• Universal formulas for counting nodal curves on surfaces by Yu-Jong Tzeng
• Some recent results on representations of p-adic special orthogonal groups by Jean-Loup Waldspurger
• Wellposedness of the two- and three-dimensional full water wave problem by Sijue Wu

This website lists topic discussed for Current Developments in Mathematics in 2011.