A fellow named Kevin Van Horn did a similar project, writing an extended commentary on the book. I thought I saw him on this site once, but can't find him. Probably another hallucination.
But it seems he's an HPMOR fan - such fine taste in books.
http://lesswrong.com/lw/bdo/rationality_quotes_april_2012/692e
See his site for his commentary on Jaynes: http://ksvanhorn.com/bayes/jaynes/
I thought I saw him on this site once
There is an LW user called ksvanhorn. I have no evidence beyond the name that it's the same person.
LW user ksvanhorn linked an essay which gives an email address with the ksvanhorn domain name, providing evidence that he is indeed the author of the commentary.
Thanks for this! I'm going into more depth than Kevin, but I expect I'll find his commentary useful myself.
http://reasonableapproximation.net/2014/02/02/cliffs-notes-pttlos-part-1.html
(I'm not cross-posting this because I expect to have to make edits and don't want to have to make them in two places.)