Paul Almond's site has many philosophically deep articles on theoretical rationality along LessWrongish assumptions, including but not limited to some great atheology, an attempt to solve the problem of arbitrary UTM choice, a possible anthropic explanation why space is 3D, a thorough defense of Occam's Razor, a lot of AI theory that I haven't tried to understand, and an attempt to explain what it means for minds to be implemented (related in approach to this and this).
I am just someone who has an interest in these issues Carl, and they are all written in a private capacity: I am not, for example, anyone who works at a university. I have worked as a programmer, and as a teacher of computing, in the past.I think machineslikeus describes me as an "independent researcher" or something like that... which means, I suppose, that I write articles.
Thanks for enriching the infosphere with some nice work, Paul.