I think PG's essays and YCN can be a huge boost to scaling YC itself. He wrote of attempting of Huffman coding in the "hardest lessons" essay, perhaps he could also reference comment IDs as well. Maybe something more forum-like is necessary though, where topics can be marked "sticky" forever.

If each group of founders leaves behind their answers in a permanent form it seems like that would help with most of the common questions, leaving only the tricky new questions to be answered.