Well gee, all it is is a bunch of random pictures and some unsupported claims. I will say this though, I'm a little suspicious, for several reasons.
1. This is not what DHS does. In fact, it's hard to tell what the heck they do, but I have never seen anything that suggests they do anything related to SIGINT. In fact, everything I HAVE seen suggests they couldn't find their ass with both hands and a map...that does not speak highly of their ability to run a vast conspiracy.
2. Speaking of which, the "vast conspiracy" part of it doesn't help either. Installing this on every laptop would be a huge undertaking, particularly as most are made outside of the US. Organizing it all would involve WAY too many people to keep secret for very long, particularly as this would be an obvious and pretty substantial breach of the law. Things much smaller than this leak all the time, there is no way to keep something like this secret. Especially as the author seems to be claiming that the tech support people and the local police are in on it. And the NYT and Washington Post don't have it by now? Give me a break.
3. If this IS some plot to spy on everything everyone types, it's a particularly hamfisted way of going about it. It's a huge piece of "obvious" hardware instead of something much simpler. A few more chips on the motherboard could do the same thing, and nobody would notice. For that matter, do it in software...it's easier and less likely to be caught.
This has all the earmarks of the bullshit conspiracy. Lack of information, a brilliantly secret operation that seems to involve virtually everyone on the planet, and an approach so ludicrously stupid that it can't possibly be both secret AND true. Anyone dumb enough to do this would be too dumb to keep it secret.