I get threads in digest form sent to my yahoo mail which I actually read through a pop client (thunderbird) in my case. I can open Thunderbird in offline mode and read these while waiting in airports or on the plane.

I also get many forums sent to me in a weekly digest format and I can copy and paste links to threads I want to read into the notepad application. Then whenever I am bored and surfing the internet I go through the links.

I'll leave it to someone else to describe how they might use an offline client to post to FT but for now, I am happy just to read it even when I am not connected.