If you compromise the Gmail account of the person that controls all of them- quite realistic.

Pretty realistic. Compromises tend to be pretty far-reaching because often the weakest points are single points of failure for many system (email accounts especially).

They most likely share the same password so that multiple sendgrid employees can post to each of the pages.

Hmm, given that one of those is compromised, I'd say it's more likely that the rest are as well--Bayesian reasoning and all that. (Yeah, I don't actually know much about probability :P.)

People share passwords all the time. Also, if somebody's computer or email account was compromised, chances are that would also give up the credentials for all of the sites.

It's quite realistic. Or rather, the possibility that SendGrid's official Facebook, Twitter, blog, and status site all use the same password is quite realistic, and if that's the case then you only have to compromise one site to get them all.

Their blog at least is running wordpress, from wordpress.com. It's possible that they did get compromised somewhere since all of the things seem to be external to them that they did get compromised and they weren't entirely aware of it right away because of the DDoSing. I can't imagine though that they can't have heard of this by now and aren't trying to do something about it if it's fake.

considering they were paying her for PR as a "developer evangelist" I think they should be able to make a fair case for her dismissal.

As a startup lawyer (and a social media lawyer at that) I couldn't agree more. Even big companies make some unbelievably stupid mistakes when rushed to "do something."

The most likely angle of attack would be privacy law: public disclosure of private facts.

I don't know if this would stand up in court, but it doesn't have to stand up in court if the lawyers can drag it out long enough. In this particular case, that tips in her favor, because the odds of this case escalating to celebrity status are high. That scenario is every corporate lawyer's nightmare, because with celebrity status comes reliable financial support.

If she really was fired, if I were company counsel, I'd be more concerned about the employment law issues vs. the public statement. They did keep the post brief and factual, and I don't see anything actionable about it.