The Third Road
In particular, The Third Road thread, which has become a little messy. Links to recent papers and discussions appear on page 12. The original argument with Careful starts around page 7. The Baratin-Freidel thread is still growing, as is the de Sitter one. The preons also appeared in this nuclear thread, and I'm quite fond of this old thread.
Away from PF we have beautiful pearls like the Anthropic Debate thread at Not Even Wrong, or the Anthropic Brain thread at Cosmic Variance.
Happy reading. I'm taking the dog (not my dog) for a walk.