The poll allows multiple choices...which are your picks for the 2008 papers likely to prove most valuable to future research? The Uncanny Precision of the Spectral Action Ali H. Chamseddine, Alain Connes http://arxiv.org/abs/0812.0165 Loop Quantum Cosmology: An Overview Abhay Ashtekar http://arxiv.org/abs/0812.0177 Loop Quantum Gravity Carlo Rovelli (new review) http://relativity.livingreviews.org/Articles/lrr-2008-5/ [Broken] LQG propagator: III. The new vertex Emanuele Alesci, Eugenio Bianchi, Carlo Rovelli http://arxiv.org/abs/0812.5018 Self-energy and vertex radiative corrections in LQG Claudio Perini, Carlo Rovelli, Simone Speziale http://arxiv.org/abs/0810.1714 Background-free propagation in loop quantum gravity Simone Speziale http://arxiv.org/abs/0810.1978 On the semiclassical limit of 4d spin foam models Florian Conrady, Laurent Freidel http://arxiv.org/abs/0809.2280 Path integral representation of spin foam models of 4d gravity Florian Conrady, Laurent Freidel http://arxiv.org/abs/0806.4640 A Lagrangian approach to the Barrett-Crane spin foam model Valentin Bonzom, Etera R. Livine http://arxiv.org/abs/0812.3456 The Nonperturbative Quantum de Sitter Universe J. Ambjorn, A. Goerlich, J. Jurkiewicz, R. Loll http://arxiv.org/abs/0807.4481 Bare Action and Regularized Functional Integral of Asymptotically Safe Quantum Gravity Elisa Manrique, Martin Reuter http://arxiv.org/abs/0811.3888 Motion of a “small body” in non-metric gravity Kirill Krasnov http://arxiv.org/abs/0812.3603 Effective Theory of Braid Excitations of Quantum Geometry in terms of Feynman Diagrams Yidun Wan http://arxiv.org/abs/0809.4464 ================================ Most of these papers have been discussed some already in PF threads. One however was just posted at arxiv today. Since it may not be already known, I'll give the abstract for it: LQG propagator: III. The new vertex Emanuele Alesci, Eugenio Bianchi, Carlo Rovelli "In the first article of this series, we pointed out a difficulty in the attempt to derive the low-energy behavior of the graviton two-point function, from the loop-quantum-gravity dynamics defined by the Barrett-Crane vertex amplitude. Here we show that this difficulty disappears when using the corrected vertex amplitude recently introduced in the literature. In particular, we show that the asymptotic analysis of the new vertex amplitude recently performed by Barrett, Fairbairn and others, implies that the vertex has precisely the asymptotic structure that, in the second article of this series, was indicated as the key necessary condition for overcoming the difficulty."