I don't mean to be a hater, but does every acquisition story have to have a comment like this? If you want to congratulate them, use email or a phone call! If you want to show that you know them personally, please realize that bit of information doesn't contribute to the discussion. A semi-anonymous comment on HN will not make them feel particularly special or appreciated, and is not required by etiquette either.

Sorry, I just had to speak up in my personal bit effort to try and keep this a meaningful place.