SODA 2011: Timothy Chan: Computational Geometry for Non-Geometers: Recent Developments on Some Classical Problems. William Freeman: Where Computer Vision Needs Help from Computer Science. Bruce Reed: Graph Colouring via The Probabilistic Method. SODA 2010: Cynthia Dwork: Differential Privacy in New Settings. Noam Nisan: Google's Auction for TV Ads. Emmanuel Candes: The Power of Convex Relaxation: The Surprising Stories of Matrix Completion and Compressed Sensing. SODA 2009: Michael I. Jordan: Combinatorial Stochastic Processes and Nonparametric Bayesian Modeling. Yuval Peres: The Unreasonable Effectiveness of Martingales (Beyond Concentration). Volker Strassen: Probability, Algorithms and Complexity. SODA 2008: Bonnie Berger: Graph Algorithms for Biological Systems Analysis. Andrei Broder: Computational Advertising. Persi Diaconis: Shuffling Cards, Adding Numbers, and Symmetric Functions. SODA 2007: Maria Chudnovsky: Testing for a Theta. Philippe Flajole: Analytic Combinatorics - A Calculus of Discrete Structures. Monika R. Henzinger: Combinatorial Algorithms for Web Search Engines - Three Success Stories. SODA 2006: Alan Frieze: Random Graphs. Larry Peterson: A Strategy for Continually Reinventing the Internet. Rakesh Vohra: Predicting the 'Unpredictable'. SODA 2005: John Baez: Loop Quantum Gravity. Uriel Feige: Rigorous Analysis of Heuristics for NP-hard Problems. Micha Sharir: The Interface Between Computational and Combinatorial Geometry. SODA 2004: Bernard Chazelle: Who Says You Have to Look at the Input? The Brave New World of Sublinear Computing? Raymond Laflamme: Quantum Computing. Peter Winkler: How Random is the Human Genome? SODA 2003: Persi Diaconis: Who Cares About Permanents? S. Muthukrishnan: Data Streams: Algorithms and Applications. Ian H. Witten: Browsing Around a Digital Library. SODA 2002: Kurt Mehlhorn: The Theory Behind LEDA. Bob Connelly: The Virtues of Expanding Geometric Objects. SODA 2001: Udi Manber: Serving Billions of Pages to Hundreds of Millions of People is Harder Than It Seems. Christos Papadimitriou: Game Theory, Algorithms, and the Internet. Ronald L. Graham: Guessing Secrets. SODA 2000: Robin Thomas: Digraph Minors and Algorithms. Vasek Chvátal: Cutting Planes and the Traveling Salesman Problem. Gene Myers: The Whole Genome Assembly of Drosophila.