I went to this talk back in Dec. and also found it a little painful. PG mentioned some interesting things about actually using Arc to build the YCombinator site

I went to this talk back in Dec. and also found it a little painful. PG mentioned some interesting things about actually using Arc to build the YCombinator site (include this Reddit-like site). A lot of the rest of it approached the "what is beauty?" stratosphere where oxygen gets thin...