Content: PREFACE; 1. Status of Fuel Cells and the Challenges Facing Fuel Cell Technology Today; KATHI EPPING MARTIN, JOHN P. KOPASZ, AND KEVIN W. MCMURPHY; 2. Membranes for PEM Fuel Cells Michael A. Yandrasits and Steven J. Hamrock; 3. Synthesis and Characterization of Poly(vinylidene fluoride)-g-Sulfonated Polystyrene Graft Copolymers for Proton Exchange Membrane; ZHICHENG ZHANG, ELENA CHALKOVA, MARK FEDKIN, CHUNMEI WANG, SERGUEI N. LVOV, SRIDHAR KOMARNENI, AND T. C. CHUNG; 4. Rigid Rod Polyelectrolytes with Frozen-In Free Volume: High Conductivity at Low RH; MORTON LITT, SERGIO GRANADOS-FOCIL, AND JUNWON KANG; 5. Molecular Weight Effects on Poly(arylene ether sulfone)-Based Random and Multiblock Copolymers Characteristics for Fuel Cells; ANAND S. BADAMI, HAE-SEUNG LEE, YANXIANG LI, ABHISHEK ROY, HANG WANG, AND JAMES E. MCGRATH; 6. Mesoscopic Simulations of the Hydrated Morphology of the Short-Side-Chain Perfluorosulfonic Acid Ionomer; DONGSHENG WU AND STEPHEN J. PADDISON; 7. Broadband Dielectric Spectroscopy and Conductivity Mechanism of Nafion 117 and Nafion/[ZrO2] Hybrid Inorganic-Organic Membranes; V. DI NOTO, E. NEGRO, AND S. LAVINA; 8. Broadband Dielectric Spectroscopic Studies of Nafion/Silicate Membranes; MOHAMMAD K. HASSAN AND KENNETH A. MAURITZ; 9. Chemical Durability Studies of PFSA and Nonfluorinated PEM Materials; DAVID A. SCHIRALDI, CHUN ZHOU, DEEPA SAVANT, AND THOMAS A. ZAWODZINSKI JR; 10. Open Circuit Voltage Fuel Cell Durability Testing Using Multiple PEM MEAs; GREG HAUGEN, SARA BARTA, MIKE EMERY, STEVEN HAMROCK, AND MIKE YANDRASITS; 11. Metal Oxides and Heteropoly Acids as Anodic Electrocatalysts in Direct Proton Exchange Membrane Fuel Cells; JACK R. FERRELL III AND ANDREW M. HERRING