I read it a few months back, it's still a good read. PG's blog posts aren't easily dated, as you'll often see posts from 5 years ago linked here on HN.
I was looking at learning a new language and considered Lisp, but decided on rails because it seems to be the most common language for web-apps these days, and therefore it should be easier to find good Rails developers than Lisp developers.
I'm curious if PG feels the same way about using Lisp/Arc for business reasons vs. Lisp for technical reasons.