We should have known this (a new Google employee blogging candidly — including negatively — about the company and his experiences) wouldn’t last. We’ve seen it a few times now. Criticize your company, reveal “inside dope,” etc. and you’re probably lucky if it’s just your blog (and not your job) that disappears. Battelle has more.
UPDATE: Google Blogoscoped has the story of Mark Jen’s return to blogging, and a comparison between the new (edited) content and the old. Mostly, he just took out financial-related info. That portion of the blog had raised red flags with me, too, when I first read it. Not surprised Google felt the same, being a public company and all.