More information has come in, so i will revise parts of the preceding post.

From Ashtekar there are several valuable surveys. Here are links to a couple of recent ones that might be useful.

http://arxiv.org/abs/gr-qc/0410054
Gravity and the Quantum

http://arxiv.org/abs/gr-qc/0404018
Background Independent Quantum Gravity: A Status Report

What is especially interesting right now is a book Ashtekar is preparing, to be published by World Scientific, called

**A Hundred Years of Relativity**.

This book has a broad scope covering all of General Relativity, including numerical GR and testing. It will show how Ashtekar sees LQG and allied approaches to quantizing Gen Rel in the wider context. Several chapters of this book are already online as preprints:

Martin Bojowald

http://arxiv.org/abs/gr-qc/0505057
Elements of Loop Quantum Cosmology

Larry Ford

http://arxiv.org/abs/gr-qc/0504096
Rodolfo Gambini and Jorge Pullin

http://arxiv.org/abs/gr-qc/0505023
Discrete space-time

Hermann Nicolai

["Gravitational Billiards, Dualities and Hidden Symmetries" not yet online]

Thanu Padmanabhan

http://arxiv.org/abs/gr-qc/0503107
Understanding Our Universe: Current Status and Open Issues

Alan Rendall

http://arxiv.org/abs/gr-qc/0503112
Clifford Will

http://arxiv.org/abs/gr-qc/0504086
Was Einstein Right? Testing Relativity at the Centenary