I spend a lot of time at the Cub Cadet Forum.
It is the first forum that I joined. I like how the Cub Cadet forum is layed out which is where I see the "Airstream Forums" heading toward.
What I miss here from there is the FAQ section that relates to the "topic" i.e. "How do I tell what year my trailer was made" type of questions.
I also spend a lot of time at Farmall Cub Forum.
This is the second Forum I joined. This one is harder to follow. Heck if you don't read any forum for a day or two you spend hours catching up. I guess it is the nature of the beast.
With Airstreams, I guess it is harder to keep things organized. No two people think the same. I have gotten used to the flow of "one" thread and try to keep up. I don't know if that would work here. The only thing I would change it the sub-dividing of the catagories. It gets very hard to dig for information without getting lost or without bookmarking/subscribing to every thread that you think may be useful. The search engine takes a little getting used to, but is very helpful.
Also, I find that I can kill a few hours with out knowing it reading this forum!!