Lee Smolin is a very active researcher and a Google search brings up many items. He has become somewhat of a cult figure and Discovery Magazine touted him as the 'New Einstein'. Below are, in my experience, some of the better links for those who want to develop a better appreciation for Loop Qantum Gravity and Lee's contribution to it.
Lee is a Long Term Researcher at the Perimeter Institute in Waterloo Canada along with Fontini Markopoulou and other leading Loop Quantum Gravity researchers. Makes me proud to be Canadian! The Institute's site is where I go to see what Lee has written this past month.
I do not have an extensive background in the mathematics used in Lee's papers but it has been a great joy to find that I am able to follow the arguments presented. I think Lee and other leading physicists, including David Deutsch, take a lot of pride in making their work accessible to the motivated public.
Lees page at the Perimeter Institute is can be reached by choosing 'Long Term Researchers' from the link below.
Looks like this site on Quantum Gravity, Physics and Philosophy is current to 2001.
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The section on Lee is extensive and appears current as of 2002. This site is the best I've seen at presenting the broad context of Lee's work.