mental_floss by accident and saw that I've been there eight years now. The last time I looked at it, it said seven years and twelve months, which is kind of amusing.
Eight years! I never worked for the same employer that long in my entire career in radio. I've actually been posting at Neatorama for longer than that, but mental_floss was the first blog that ever paid me for posting. Neatorama and YesButNoButYes started paying when they started making money.
Of course, job longevity is a double-edged sword. Thinking of topics to write about gets harder, because when some idea comes up, I've most likely already done that post by now. And after eight years, you'd think I'd be good at it. Go figure.