Funny. I literally just emailed the EFF to ask if they are looking at this case and/or are in a position to support the journalist if needed.

I also asked what they suggest individuals like us can do (if anything) to help.

Similar to you, I Googled first, and found a short comment from someone at the EFF but nothing indicating that they were directly involved in this case so far.

I'm not even a US citizen (I'm a Brit) but something about this case makes me incredibly angry and frustrated. Not just on behalf of the journalist himself but also because of the hugely negative impact it will have on responsible disclosure of security issues in the future if this action against him proceeds.